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<h1 id="数组">数组</h1>
<ul>
<li><a href="#arraychangekeycase">array_change_key_case - 将数组中的所有键名修改为全大写或全小写</a></li>
<li><a href="#arraychunk">array_chunk - 将一个数组分割成多个</a></li>
<li><a href="#arraycolumn">array_column - 返回数组中指定的一列</a></li>
<li><a href="#arraycombine">array_combine - 创建一个数组，用一个数组的值作为其键名，另一个数组的值作为其值</a></li>
<li><a href="#arraycountvalues">array_count_values - 统计数组中所有的值</a></li>
<li><a href="#arraydiffassoc">array_diff_assoc - 带索引检查来计算数组的差集</a></li>
<li><a href="#arraydiffkey">array_diff_key - 对键名比较来计算数组的差集</a></li>
<li><a href="#arraydiffuassoc">array_diff_uassoc - 使用用户提供的回调函数做索引检查来计算数组的差集</a></li>
<li><a href="#arraydiffukey">array_diff_ukey - 使用用户提供的回调函数对键名比较来计算数组的差集</a></li>
<li><a href="#arraydiff">array_diff - 计算数组的差集</a></li>
<li><a href="#arrayfillkeys">array_fill_keys - 使用指定的键和值填充数组</a></li>
<li><a href="#arrayfill">array_fill - 用给定的值填充数组</a></li>
<li><a href="#arrayfilter">array_filter - 用回调函数过滤数组中的单元</a></li>
<li><a href="#arrayflip">array_flip - 交换数组中的键和值</a></li>
<li><a href="#arrayintersectassoc">array_intersect_assoc - 带索引检查来计算数组的交集</a></li>
<li><a href="#arrayintersectkey">array_intersect_key - 对键名比较来计算数组的交集</a></li>
<li><a href="#arrayintersectuassoc">array_intersect_uassoc - 使用用户提供的回调函数做索引检查来计算数组的交集</a></li>
<li><a href="#arrayintersectukey">array_intersect_ukey - 使用用户提供的回调函数对键名比较来计算数组的交集</a></li>
<li><a href="#arrayintersect">array_intersect - 计算数组的交集</a></li>
<li><a href="#arraykeyexists">array_key_exists - 检查数组里是否有指定的键名或索引</a></li>
<li><a href="#arraykeyfirst">array_key_first - 获取数组的第一个键</a></li>
<li><a href="#arraykeylast">array_key_last - 获取数组的最后一个键</a></li>
<li><a href="#arraykeys">array_keys - 返回数组中部分的或所有的键名</a></li>
<li><a href="#arraymap">array_map - 为数组的每个元素应用回调函数</a></li>
<li><a href="#arraymergerecursive">array_merge_recursive - 递归地合并一个或多个数组</a></li>
<li><a href="#arraymerge">array_merge - 合并一个或多个数组</a></li>
<li><a href="#arraymultisort">array_multisort - 对多个数组或多维数组进行排序</a></li>
<li><a href="#arraypad">array_pad - 以指定长度将一个值填充进数组</a></li>
<li><a href="#arraypop">array_pop - 弹出数组最后一个单元（出栈）</a></li>
<li><a href="#arrayproduct">array_product - 计算数组中所有值的乘积</a></li>
<li><a href="#arraypush">array_push - 将一个或多个单元压入数组的末尾（入栈）</a></li>
<li><a href="#arrayrand">array_rand - 从数组中随机取出一个或多个单元</a></li>
<li><a href="#arrayreduce">array_reduce - 用回调函数迭代地将数组简化为单一的值</a></li>
<li><a href="#arrayreplacerecursive">array_replace_recursive - 使用传递的数组递归地替换第一个数组的元素</a></li>
<li><a href="#arrayreplace">array_replace - 使用传递的数组替换第一个数组的元素</a></li>
<li><a href="#arrayreverse">array_reverse - 返回单元顺序相反的数组</a></li>
<li><a href="#arraysearch">array_search - 在数组中搜索给定的值，如果成功则返回首个相应的键名</a></li>
<li><a href="#arrayshift">array_shift - 将数组开头的单元移出数组</a></li>
<li><a href="#arrayslice">array_slice - 从数组中取出一段</a></li>
<li><a href="#arraysplice">array_splice - 去掉数组中的某一部分并用其它值取代</a></li>
<li><a href="#arraysum">array_sum - 对数组中所有值求和</a></li>
<li><a href="#arrayudiffassoc">array_udiff_assoc - 带索引检查来计算数组的差集，使用用户提供的回调函数比较数据</a></li>
<li><a href="#arrayudiffuassoc">array_udiff_uassoc - 带索引检查来计算数组的差集，使用用户提供的回调函数比较数据和索引</a></li>
<li><a href="#arrayudiff">array_udiff - 使用用户提供的回调函数来计算数组的差集</a></li>
<li><a href="#arrayuintersectassoc">array_uintersect_assoc - 带索引检查来计算数组的交集，使用用户提供的回调函数比较数据</a></li>
<li><a href="#arrayuintersectuassoc">array_uintersect_uassoc - 带索引检查来计算数组的交集，使用用户提供的回调函数比较数据和索引</a></li>
<li><a href="#arrayuintersect">array_uintersect - 使用用户提供的回调函数来计算数组的交集</a></li>
<li><a href="#arrayunique">array_unique - 移除数组中重复的值</a></li>
<li><a href="#arrayunshift">array_unshift - 在数组开头插入一个或多个单元</a></li>
<li><a href="#arrayvalues">array_values - 返回数组中所有的值</a></li>
<li><a href="#arraywalkrecursive">array_walk_recursive - 使用用户自定义函数对数组中的每个元素递归地做回调处理</a></li>
<li><a href="#arraywalk">array_walk - 使用用户自定义函数对数组中的每个元素做回调处理</a></li>
<li><a href="#array">array - 新建一个数组</a></li>
<li><a href="#arsort">arsort - 对数组中的值进行逆向排序并保持索引关联</a></li>
<li><a href="#asort">asort - 对数组中的值进行排序并保持索引关联</a></li>
<li><a href="#compact">compact - 创建一个包含变量名和它们的值的数组</a></li>
<li><a href="#count">count - 计算数组中的单元数目，或对象中的属性个数</a></li>
<li><a href="#current">current - 返回数组中的当前单元</a></li>
<li><a href="#end">end - 将数组的内部指针指向最后一个单元</a></li>
<li><a href="#extract">extract - 从数组中将变量导入到当前的符号表</a></li>
<li><a href="#inarray">in_array - 检查数组中是否存在某个值</a></li>
<li><a href="#keyexists">key_exists - 检查数组里是否有指定的键名或索引</a></li>
<li><a href="#key">key - 从数组中取得键名</a></li>
<li><a href="#krsort">krsort - 对数组中的键名进行逆向排序</a></li>
<li><a href="#ksort">ksort - 对数组中的键名进行排序</a></li>
<li><a href="#list">list - 把数组中的值赋给一组变量</a></li>
<li><a href="#natcasesort">natcasesort - 用“自然排序”算法对数组中的值进行不区分大小写字母的排序并保持索引关联</a></li>
<li><a href="#natsort">natsort - 用“自然排序”算法对数组中的值进行排序并保持索引关联</a></li>
<li><a href="#next">next - 将数组中的内部指针向前移动一位</a></li>
<li><a href="#pos">pos - 返回数组中的当前单元</a></li>
<li><a href="#prev">prev - 将数组的内部指针倒回一位</a></li>
<li><a href="#range">range - 根据范围创建数组，包含指定的元素</a></li>
<li><a href="#reset">reset - 将数组的内部指针指向第一个单元</a></li>
<li><a href="#rsort">rsort - 对数组中的值进行逆向排序</a></li>
<li><a href="#shuffle">shuffle - 打乱数组</a></li>
<li><a href="#sizeof">sizeof - 计算数组中的单元数目，或对象中的属性个数</a></li>
<li><a href="#sort">sort - 对数组中的值进行排序</a></li>
<li><a href="#uasort">uasort - 使用用户自定义函数对数组中的值进行排序并保持索引关联</a></li>
<li><a href="#uksort">uksort - 使用用户自定义函数对数组中的键名进行排序</a></li>
<li><a href="#usort">usort - 使用用户自定义函数对数组中的值进行排序</a></li>
</ul>
<h2 id="arraychangekeycase">array_change_key_case</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_change_key_case</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_change_key_case</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_change_key_case</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">CASE_LOWER</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_change_key_case</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">CASE_UPPER</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["FOO"]=> string(3) "cat" ["BAR"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_change_key_case</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'FOO'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">CASE_LOWER</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_change_key_case</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'FOO'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">CASE_UPPER</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["FOO"]=> string(3) "dog" }</span>
</code></pre>
<h2 id="arraychunk">array_chunk</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_chunk</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> array(2) { [0]=> int(2) [1]=> int(4) } [1]=> array(1) { [0]=> int(5) } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_chunk</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> array(1) { [0]=> string(3) "cat" } [1]=> array(1) { [0]=> string(3) "dog" } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_chunk</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> array(1) { ["foo"]=> string(3) "cat" } [1]=> array(1) { ["bar"]=> string(3) "dog" } }</span>
</code></pre>
<h2 id="arraycolumn">array_column</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_column</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">4</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_column</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">2135</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">3245</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "cat" [1]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_column</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">2135</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">3245</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'id'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [2135]=> string(3) "cat" [3245]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_column</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">2135</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">3245</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">null</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> array(2) { ["id"]=> int(2135) ["name"]=> string(3) "cat" } [1]=> array(2) { ["id"]=> int(3245) ["name"]=> string(3) "dog" } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_column</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">2135</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'id'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">3245</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'name'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">null</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'id'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [2135]=> array(2) { ["id"]=> int(2135) ["name"]=> string(3) "cat" } [3245]=> array(2) { ["id"]=> int(3245) ["name"]=> string(3) "dog" } }</span>
</code></pre>
<h2 id="arraycombine">array_combine</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_combine</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_combine</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_combine</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_combine</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(3) "cat" } ["bar"]=> array(1) { [0]=> string(3) "dog" } }</span>
</code></pre>
<h2 id="arraycountvalues">array_count_values</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_count_values</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> int(1) ["bar"]=> int(1) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_count_values</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'BAR'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> int(1) ["bar"]=> int(1) ["FOO"]=> int(1) ["BAR"]=> int(1) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_count_values</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(1) [1]=> int(1) [2]=> int(2) }</span>
</code></pre>
<h2 id="arraydiffassoc">array_diff_assoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arraydiffkey">array_diff_key</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'0'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["baz"]=> string(4) "bird" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arraydiffuassoc">array_diff_uassoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'0'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arraydiffukey">array_diff_ukey</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'0'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["baz"]=> string(4) "bird" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arraydiff">array_diff</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_diff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
</code></pre>
<h2 id="arrayfillkeys">array_fill_keys</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [2]=> int(0) [4]=> int(0) [5]=> int(0) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "cat" ["baz"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> array(3) { [0]=> string(3) "cat" [1]=> string(3) "dog" [2]=> string(4) "bird" } ["bar"]=> array(3) { [0]=> string(3) "cat" [1]=> string(3) "dog" [2]=> string(4) "bird" } ["baz"]=> array(3) { [0]=> string(3) "cat" [1]=> string(3) "dog" [2]=> string(4) "bird" } }</span>
</code></pre>
<h2 id="arrayfill">array_fill</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(0) [1]=> int(0) [2]=> int(0) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [2]=> int(0) [3]=> int(0) [4]=> int(0) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [-2]=> int(0) [0]=> int(0) [1]=> int(0) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token function">array_fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> array(3) { [0]=> int(0) [1]=> int(0) [2]=> int(0) } [1]=> array(3) { [0]=> int(0) [1]=> int(0) [2]=> int(0) } [2]=> array(3) { [0]=> int(0) [1]=> int(0) [2]=> int(0) } }</span>
</code></pre>
<h2 id="arrayfilter">array_filter</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Filter odd number.
*
* @param int $value
* @return bool
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token variable">$value</span><span class="token punctuation">)</span><span class="token punctuation">:</span> bool
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$value</span> <span class="token operator">&</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Filter even number.
*
* @param int $value
* @return bool
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>int <span class="token variable">$value</span><span class="token punctuation">)</span><span class="token punctuation">:</span> bool
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token operator">!</span><span class="token punctuation">(</span><span class="token variable">$value</span> <span class="token operator">&</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Filter the specified value and key.
*
* @param int $value
* @param int $key
* @return bool
*/</span>
<span class="token keyword">function</span> <span class="token function">baz</span><span class="token punctuation">(</span>int <span class="token variable">$value</span><span class="token punctuation">,</span> int <span class="token variable">$key</span><span class="token punctuation">)</span><span class="token punctuation">:</span> bool
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$value</span> <span class="token operator">==</span> <span class="token number">2</span> <span class="token operator">&&</span> <span class="token variable">$key</span> <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0.0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(3) "foo" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> int(2) [1]=> int(4) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token constant">ARRAY_FILTER_USE_KEY</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [1]=> int(4) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token constant">ARRAY_FILTER_USE_KEY</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> int(2) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_filter</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token constant">ARRAY_FILTER_USE_BOTH</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
</code></pre>
<h2 id="arrayflip">array_flip</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_flip</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [2]=> int(0) [4]=> int(1) [5]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_flip</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["cat"]=> string(3) "foo" ["dog"]=> string(3) "bar" ["bird"]=> string(3) "baz" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_flip</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'4'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [2]=> int(3) [4]=> int(4) [5]=> int(5) }</span>
</code></pre>
<h2 id="arrayintersectassoc">array_intersect_assoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayintersectkey">array_intersect_key</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'0'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_key</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayintersectuassoc">array_intersect_uassoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'0'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayintersectukey">array_intersect_ukey</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'0'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect_ukey</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayintersect">array_intersect</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> int(2) [3]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_intersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arraykeyexists">array_key_exists</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_exists</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_exists</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_exists</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
</code></pre>
<h2 id="arraykeyfirst">array_key_first</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_first</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_first</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
</code></pre>
<h2 id="arraykeylast">array_key_last</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_last</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_key_last</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "bar"</span>
</code></pre>
<h2 id="arraykeys">array_keys</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(0) [1]=> int(1) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [1]=> string(3) "bar" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_keys</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arraymap">array_map</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Calculate the cube of an integer.
*
* @param int $number
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token variable">$number</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token variable">$number</span> <span class="token operator">*</span><span class="token operator">*</span> <span class="token number">3</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Calculate the sum of two integers.
*
* @param int $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>int <span class="token variable">$a</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token variable">$a</span> <span class="token operator">+</span> <span class="token variable">$b</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_map</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(8) [1]=> int(64) [2]=> int(125) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_map</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(4) [1]=> int(8) [2]=> int(10) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_map</span><span class="token punctuation">(</span><span class="token constant">null</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_map</span><span class="token punctuation">(</span><span class="token constant">null</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> array(3) { [0]=> int(0) [1]=> string(3) "cat" [2]=> int(1) } [1]=> array(3) { [0]=> NULL [1]=> NULL [2]=> int(2) } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_map</span><span class="token punctuation">(</span><span class="token function">fn</span><span class="token punctuation">(</span>int <span class="token variable">$number</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$number</span> <span class="token operator">*</span><span class="token operator">*</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(8) [1]=> int(64) [2]=> int(125) }</span>
</code></pre>
<h2 id="arraymergerecursive">array_merge_recursive</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" ["baz"]=> string(4) "bird" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(2) { [0]=> string(3) "cat" [1]=> string(3) "dog" } ["bar"]=> array(2) { [0]=> string(3) "dog" [1]=> string(3) "dog" } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(2) { [0]=> string(3) "cat" [1]=> string(3) "dog" } ["bar"]=> array(2) { [0]=> string(3) "dog" [1]=> string(3) "cat" } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> array(2) { ["bar"]=> array(2) { [0]=> string(3) "cat" [1]=> string(3) "dog" } [0]=> string(4) "bird" } [0]=> int(2) [1]=> int(4) }</span>
</code></pre>
<h2 id="arraymerge">array_merge</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" ["baz"]=> string(4) "bird" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "dog" ["bar"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "dog" ["bar"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_merge</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> array(2) { ["bar"]=> string(3) "dog" [0]=> string(4) "bird" } [0]=> int(2) [1]=> int(4) }</span>
</code></pre>
<h2 id="arraymultisort">array_multisort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">50</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(100) [1]=> int(50) [2]=> int(0) [3]=> int(10) [4]=> int(100) [5]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token number">11</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(2) "10" [1]=> string(1) "a" [2]=> int(11) [3]=> int(100) [4]=> int(100) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> int(1) [1]=> int(1) [2]=> int(2) [3]=> string(1) "2" [4]=> int(3) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'0bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["bar"]=> string(3) "dog" ["baz"]=> string(5) "0bird" ["foo"]=> string(4) "2cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(4) [1]=> int(5) [2]=> int(2) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token number">11</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(2) "10" [1]=> int(100) [2]=> int(100) [3]=> int(11) [4]=> string(1) "a" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> int(1) [1]=> string(1) "2" [2]=> int(3) [3]=> int(2) [4]=> int(1) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token number">11</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(2) "10" [1]=> int(100) [2]=> int(100) [3]=> int(11) [4]=> string(1) "a" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> int(1) [1]=> string(1) "2" [2]=> int(3) [3]=> int(2) [4]=> int(1) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token number">11</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(2) "10" [1]=> int(11) [2]=> int(100) [3]=> int(100) [4]=> string(1) "a" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> int(1) [1]=> int(2) [2]=> string(1) "2" [3]=> int(3) [4]=> int(1) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["a"]=> string(4) "Cat1" ["c"]=> string(4) "Cat3" ["b"]=> string(4) "cat2" ["d"]=> string(5) "cat20" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(2) [1]=> int(5) [2]=> int(4) [3]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["a"]=> string(4) "Cat1" ["b"]=> string(4) "cat2" ["d"]=> string(5) "cat20" ["c"]=> string(4) "Cat3" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(2) [1]=> int(4) [2]=> int(0) [3]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["a"]=> string(4) "Cat1" ["b"]=> string(4) "cat2" ["c"]=> string(4) "Cat3" ["d"]=> string(5) "cat20" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token number">11</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_multisort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_ASC</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">,</span> <span class="token constant">SORT_DESC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(2) "10" [1]=> int(100) [2]=> int(100) [3]=> int(11) [4]=> string(1) "a" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> int(1) [1]=> int(3) [2]=> string(1) "2" [3]=> int(2) [4]=> int(1) }</span>
</code></pre>
<h2 id="arraypad">array_pad</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_pad</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(0) [4]=> int(0) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_pad</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(1) [1]=> int(1) [2]=> int(1) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_pad</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
</code></pre>
<h2 id="arraypop">array_pop</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_pop</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// NULL</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_pop</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(5)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> int(2) [1]=> int(4) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_pop</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
</code></pre>
<h2 id="arrayproduct">array_product</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_product</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_product</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(40)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_product</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
</code></pre>
<h2 id="arraypush">array_push</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_push</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> array(0) { } }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_push</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" [0]=> string(4) "bird" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_push</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" [0]=> array(0) { } [1]=> string(4) "bird" }</span>
</code></pre>
<h2 id="arrayrand">array_rand</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_rand</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_rand</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_rand</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="arrayreduce">array_reduce</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Calculate the sum of two integers.
*
* @param int|null $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span><span class="token operator">?</span>int <span class="token variable">$a</span> <span class="token operator">=</span> <span class="token constant">null</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token variable">$a</span> <span class="token operator">+</span> <span class="token variable">$b</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_reduce</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(11)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_reduce</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(21)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_reduce</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(10)</span>
</code></pre>
<h2 id="arrayreplacerecursive">array_replace_recursive</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(0) [1]=> int(1) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(4) "bird" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" [0]=> int(0) [1]=> int(1) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(5) "horse" } ["bar"]=> array(2) { [0]=> string(3) "dog" [1]=> string(4) "bird" } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(5) "horse" } ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace_recursive</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'horse'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(5) "horse" } ["bar"]=> array(2) { [0]=> string(3) "dog" [1]=> string(4) "bird" } }</span>
</code></pre>
<h2 id="arrayreplace">array_replace</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(0) [1]=> int(1) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(4) "bird" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" [0]=> int(0) [1]=> int(1) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(5) "horse" } ["bar"]=> array(1) { [0]=> string(3) "dog" } }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(5) "horse" } ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'horse'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> array(1) { [0]=> string(5) "horse" } ["bar"]=> array(1) { [0]=> string(3) "dog" } }</span>
</code></pre>
<h2 id="arrayreverse">array_reverse</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_reverse</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(5) [1]=> int(4) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_reverse</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [2]=> int(5) [1]=> int(4) [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_reverse</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["bar"]=> string(3) "dog" ["foo"]=> string(3) "cat" }</span>
</code></pre>
<h2 id="arraysearch">array_search</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'CAT'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_search</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
</code></pre>
<h2 id="arrayshift">array_shift</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_shift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// NULL</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_shift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> int(4) [1]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_shift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["bar"]=> string(3) "dog" }</span>
</code></pre>
<h2 id="arrayslice">array_slice</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(1) "c" [1]=> string(1) "d" [2]=> string(1) "e" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "c" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "c" [1]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "d" [1]=> string(1) "e" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_slice</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [3]=> string(1) "d" }</span>
</code></pre>
<h2 id="arraysplice">array_splice</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(1) "c" [1]=> string(1) "d" [2]=> string(1) "e" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "a" [1]=> string(1) "b" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" [4]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "c" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "d" [3]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "c" [1]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "d" [1]=> string(1) "e" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'x'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "x" [4]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'x'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(5) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "x" [4]=> string(1) "e" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'e'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_splice</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'x'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'y'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'z'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(7) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "x" [4]=> string(1) "y" [5]=> string(1) "z" [6]=> string(1) "e" }</span>
</code></pre>
<h2 id="arraysum">array_sum</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_sum</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_sum</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(11)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_sum</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">1.2</span><span class="token punctuation">,</span> <span class="token number">2.3</span><span class="token punctuation">,</span> <span class="token number">3.4</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(6.9)</span>
</code></pre>
<h2 id="arrayudiffassoc">array_udiff_assoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayudiffuassoc">array_udiff_uassoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayudiff">array_udiff</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(3) "cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_udiff</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayuintersectassoc">array_uintersect_assoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_assoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayuintersectuassoc">array_uintersect_uassoc</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect_uassoc</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayuintersect">array_uintersect</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Return the result of the comparison.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">===</span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_uintersect</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
</code></pre>
<h2 id="arrayunique">array_unique</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'4'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2bird'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> string(4) "2cat" ["bar"]=> string(4) "2dog" ["baz"]=> string(5) "2bird" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2bird'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["foo"]=> string(4) "2cat" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'02'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> string(2) "02" [4]=> string(2) "04" [5]=> string(2) "05" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'02'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'04'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'05'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> string(2) "02" [4]=> string(2) "04" [5]=> string(2) "05" }</span>
</code></pre>
<h2 id="arrayunshift">array_unshift</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unshift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(0) { }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unshift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(2) [1]=> int(2) [2]=> int(4) [3]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unshift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(6)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_unshift</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" } [1]=> int(2) [2]=> int(4) [3]=> int(5) }</span>
</code></pre>
<h2 id="arrayvalues">array_values</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_values</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_values</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "cat" [1]=> string(3) "dog" }</span>
</code></pre>
<h2 id="arraywalkrecursive">array_walk_recursive</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Calculate the cube of an integer.
*
* @param int &$value
* @param int $key
* @return void
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token operator">&</span><span class="token variable">$value</span><span class="token punctuation">,</span> int <span class="token variable">$key</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token variable">$value</span> <span class="token operator">=</span> <span class="token variable">$value</span> <span class="token operator">*</span><span class="token operator">*</span> <span class="token number">3</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Calculate the sum of two integers.
*
* @param int &$value
* @param int $key
* @param int $data
* @return void
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>int <span class="token operator">&</span><span class="token variable">$value</span><span class="token punctuation">,</span> int <span class="token variable">$key</span><span class="token punctuation">,</span> int <span class="token variable">$data</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token variable">$value</span> <span class="token operator">+</span><span class="token operator">=</span> <span class="token variable">$data</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_walk_recursive</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(8) [1]=> int(64) [2]=> int(125) [3]=> array(3) { [0]=> int(8) [1]=> int(64) [2]=> int(125) } }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_walk_recursive</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(3) [1]=> int(5) [2]=> int(6) [3]=> array(3) { [0]=> int(3) [1]=> int(5) [2]=> int(6) } }</span>
</code></pre>
<h2 id="arraywalk">array_walk</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Calculate the cube of an integer.
*
* @param int &$value
* @param int $key
* @return void
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token operator">&</span><span class="token variable">$value</span><span class="token punctuation">,</span> int <span class="token variable">$key</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token variable">$value</span> <span class="token operator">=</span> <span class="token variable">$value</span> <span class="token operator">*</span><span class="token operator">*</span> <span class="token number">3</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Calculate the sum of two integers.
*
* @param int &$value
* @param int $key
* @param int $data
* @return void
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>int <span class="token operator">&</span><span class="token variable">$value</span><span class="token punctuation">,</span> int <span class="token variable">$key</span><span class="token punctuation">,</span> int <span class="token variable">$data</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token variable">$value</span> <span class="token operator">+</span><span class="token operator">=</span> <span class="token variable">$data</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_walk</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(8) [1]=> int(64) [2]=> int(125) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">array_walk</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(3) [1]=> int(5) [2]=> int(6) }</span>
</code></pre>
<h2 id="array">array</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(3) "cat" [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
</code></pre>
<h2 id="arsort">arsort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [2]=> int(5) [1]=> int(4) [0]=> int(2) [5]=> int(2) [4]=> int(1) [3]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["bar"]=> string(3) "dog" ["foo"]=> string(3) "cat" ["baz"]=> string(4) "bird" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [2]=> string(1) "5" [1]=> int(4) [0]=> string(1) "2" [5]=> int(2) [4]=> string(1) "1" [3]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'1dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'0bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> string(4) "2cat" ["bar"]=> string(4) "1dog" ["baz"]=> string(5) "0bird" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [2]=> int(5) [1]=> int(4) [5]=> int(22) [0]=> int(20) [4]=> int(1) [3]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [2]=> int(5) [1]=> int(4) [5]=> int(22) [0]=> int(20) [4]=> int(1) [3]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat10'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["bar"]=> string(5) "cat12" ["baz"]=> string(5) "cat10" ["qux"]=> string(4) "cat2" ["foo"]=> string(4) "cat1" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["qux"]=> string(5) "cat20" ["bar"]=> string(4) "cat2" ["baz"]=> string(4) "Cat3" ["foo"]=> string(4) "Cat1" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["baz"]=> string(4) "Cat3" ["qux"]=> string(5) "cat20" ["bar"]=> string(4) "cat2" ["foo"]=> string(4) "Cat1" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">arsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["qux"]=> string(5) "cat20" ["baz"]=> string(4) "Cat3" ["bar"]=> string(4) "cat2" ["foo"]=> string(4) "Cat1" }</span>
</code></pre>
<h2 id="asort">asort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [3]=> int(0) [4]=> int(1) [0]=> int(2) [5]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["baz"]=> string(4) "bird" ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [3]=> int(0) [4]=> string(1) "1" [0]=> string(1) "2" [5]=> int(2) [1]=> int(4) [2]=> string(1) "5" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'1dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'0bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["baz"]=> string(5) "0bird" ["bar"]=> string(4) "1dog" ["foo"]=> string(4) "2cat" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [3]=> int(0) [4]=> int(1) [0]=> int(20) [5]=> int(22) [1]=> int(4) [2]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [3]=> int(0) [4]=> int(1) [0]=> int(20) [5]=> int(22) [1]=> int(4) [2]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat10'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(4) "cat1" ["qux"]=> string(4) "cat2" ["baz"]=> string(5) "cat10" ["bar"]=> string(5) "cat12" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(4) "Cat1" ["baz"]=> string(4) "Cat3" ["bar"]=> string(4) "cat2" ["qux"]=> string(5) "cat20" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(4) "Cat1" ["bar"]=> string(4) "cat2" ["qux"]=> string(5) "cat20" ["baz"]=> string(4) "Cat3" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(4) "Cat1" ["bar"]=> string(4) "cat2" ["baz"]=> string(4) "Cat3" ["qux"]=> string(5) "cat20" }</span>
</code></pre>
<h2 id="compact">compact</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">compact</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token variable">$qux</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">compact</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" ["baz"]=> string(3) "baz" ["qux"]=> array(4) { [0]=> string(3) "cat" [1]=> string(3) "dog" [2]=> string(3) "baz" [3]=> string(3) "qux" } }</span>
</code></pre>
<h2 id="count">count</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">COUNT_RECURSIVE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(7)</span>
</code></pre>
<h2 id="current">current</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
</code></pre>
<h2 id="end">end</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">end</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">prev</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">end</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
</code></pre>
<h2 id="extract">extract</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_OVERWRITE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_SKIP</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "baz"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_PREFIX_SAME</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'prefix'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$qux</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "horse"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_PREFIX_ALL</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'prefix'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_qux</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "horse"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">0</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token number">1</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_PREFIX_INVALID</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'prefix'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_1</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'test'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_IF_EXISTS</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'test'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'horse'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">EXTR_PREFIX_IF_EXISTS</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'prefix'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$test</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "horse"</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">;</span>
<span class="token variable">$array</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">extract</span><span class="token punctuation">(</span><span class="token variable">$array</span><span class="token punctuation">,</span> <span class="token constant">EXTR_PREFIX_ALL</span> <span class="token operator">|</span> <span class="token constant">EXTR_REFS</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'prefix'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$prefix_baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token variable">$prefix_foo</span><span class="token punctuation">,</span> <span class="token variable">$prefix_bar</span><span class="token punctuation">,</span> <span class="token variable">$prefix_baz</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">11</span><span class="token punctuation">,</span> <span class="token number">111</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$array</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> &int(1) ["bar"]=> &int(11) ["baz"]=> &int(111) }</span>
</code></pre>
<h2 id="inarray">in_array</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">in_array</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">in_array</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">in_array</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">in_array</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'CAT'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">in_array</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">in_array</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
</code></pre>
<h2 id="keyexists">key_exists</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">key_exists</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">key_exists</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">key_exists</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
</code></pre>
<h2 id="key">key</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">key</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">key</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">key</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "baz"</span>
</code></pre>
<h2 id="krsort">krsort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [5]=> int(2) [4]=> int(1) [3]=> int(0) [2]=> int(5) [1]=> int(4) [0]=> int(2) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> string(3) "cat" ["baz"]=> string(4) "bird" ["bar"]=> string(3) "dog" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [5]=> int(2) [4]=> string(1) "1" [3]=> int(0) [2]=> string(1) "5" [1]=> int(4) [0]=> string(1) "2" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2cat'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1dog'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0bird'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["2cat"]=> string(3) "foo" ["1dog"]=> string(3) "bar" ["0bird"]=> string(3) "baz" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat12'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat10'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat2"]=> string(3) "qux" ["cat12"]=> string(3) "bar" ["cat10"]=> string(3) "baz" ["cat1"]=> string(3) "foo" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat12'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat10'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat2"]=> string(3) "qux" ["cat12"]=> string(3) "bar" ["cat10"]=> string(3) "baz" ["cat1"]=> string(3) "foo" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat12'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat10'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat12"]=> string(3) "bar" ["cat10"]=> string(3) "baz" ["cat2"]=> string(3) "qux" ["cat1"]=> string(3) "foo" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'Cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'Cat3'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat20'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat20"]=> string(3) "qux" ["cat2"]=> string(3) "bar" ["Cat3"]=> string(3) "baz" ["Cat1"]=> string(3) "foo" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'Cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'Cat3'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat20'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["Cat3"]=> string(3) "baz" ["cat20"]=> string(3) "qux" ["cat2"]=> string(3) "bar" ["Cat1"]=> string(3) "foo" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'Cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'Cat3'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat20'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">krsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat20"]=> string(3) "qux" ["Cat3"]=> string(3) "baz" ["cat2"]=> string(3) "bar" ["Cat1"]=> string(3) "foo" }</span>
</code></pre>
<h2 id="ksort">ksort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(0) [4]=> int(1) [5]=> int(2) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["bar"]=> string(3) "dog" ["baz"]=> string(4) "bird" ["foo"]=> string(3) "cat" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> string(1) "2" [1]=> int(4) [2]=> string(1) "5" [3]=> int(0) [4]=> string(1) "1" [5]=> int(2) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2cat'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1dog'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0bird'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["0bird"]=> string(3) "baz" ["1dog"]=> string(3) "bar" ["2cat"]=> string(3) "foo" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat12'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat10'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat1"]=> string(3) "foo" ["cat10"]=> string(3) "baz" ["cat12"]=> string(3) "bar" ["cat2"]=> string(3) "qux" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat12'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat10'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat1"]=> string(3) "foo" ["cat10"]=> string(3) "baz" ["cat12"]=> string(3) "bar" ["cat2"]=> string(3) "qux" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat12'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat10'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["cat1"]=> string(3) "foo" ["cat2"]=> string(3) "qux" ["cat10"]=> string(3) "baz" ["cat12"]=> string(3) "bar" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'Cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'Cat3'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat20'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["Cat1"]=> string(3) "foo" ["Cat3"]=> string(3) "baz" ["cat2"]=> string(3) "bar" ["cat20"]=> string(3) "qux" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'Cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'Cat3'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat20'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["Cat1"]=> string(3) "foo" ["cat2"]=> string(3) "bar" ["cat20"]=> string(3) "qux" ["Cat3"]=> string(3) "baz" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'Cat1'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat2'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'Cat3'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cat20'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["Cat1"]=> string(3) "foo" ["cat2"]=> string(3) "bar" ["Cat3"]=> string(3) "baz" ["cat20"]=> string(3) "qux" }</span>
</code></pre>
<h2 id="list">list</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">,</span> <span class="token variable">$baz</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(5)</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token punctuation">,</span> <span class="token variable">$baz</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(5)</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token punctuation">,</span> <span class="token punctuation">,</span> <span class="token variable">$baz</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(5)</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token keyword">list</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">,</span> <span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(5)</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$baz</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token variable">$bar</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$bar</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$baz</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "baz"</span>
<span class="token keyword">list</span><span class="token punctuation">(</span><span class="token variable">$qux</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token variable">$qux</span><span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token variable">$qux</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$qux</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
</code></pre>
<h2 id="natcasesort">natcasesort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natcasesort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natcasesort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["baz"]=> string(4) "bird" ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natcasesort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(4) "Cat1" ["bar"]=> string(4) "cat2" ["baz"]=> string(4) "Cat3" ["qux"]=> string(5) "cat20" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token operator">-</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1000</span><span class="token punctuation">,</span> <span class="token number">9</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natcasesort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(7) { [2]=> int(-2) [0]=> int(-5) [4]=> int(-1000) [3]=> int(0) [6]=> int(1) [1]=> int(3) [5]=> int(9) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'09'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'8'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'009'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'011'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natcasesort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [5]=> string(1) "0" [1]=> string(1) "8" [0]=> string(2) "09" [3]=> string(3) "009" [2]=> string(2) "10" [4]=> string(3) "011" }</span>
</code></pre>
<h2 id="natsort">natsort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["baz"]=> string(4) "bird" ["foo"]=> string(3) "cat" ["bar"]=> string(3) "dog" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { ["foo"]=> string(4) "Cat1" ["baz"]=> string(4) "Cat3" ["bar"]=> string(4) "cat2" ["qux"]=> string(5) "cat20" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token operator">-</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1000</span><span class="token punctuation">,</span> <span class="token number">9</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(7) { [2]=> int(-2) [0]=> int(-5) [4]=> int(-1000) [3]=> int(0) [6]=> int(1) [1]=> int(3) [5]=> int(9) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'09'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'8'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'10'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'009'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'011'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">natsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [5]=> string(1) "0" [1]=> string(1) "8" [0]=> string(2) "09" [3]=> string(3) "009" [2]=> string(2) "10" [4]=> string(3) "011" }</span>
</code></pre>
<h2 id="next">next</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
</code></pre>
<h2 id="pos">pos</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">pos</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">pos</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">pos</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
</code></pre>
<h2 id="prev">prev</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">prev</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
</code></pre>
<h2 id="range">range</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">range</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> int(5) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">range</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">50</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(10) [2]=> int(20) [3]=> int(30) [4]=> int(40) [5]=> int(50) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">range</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(5) [1]=> int(3) [2]=> int(1) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">range</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">range</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "a" [1]=> string(1) "c" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">range</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'d'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "d" [1]=> string(1) "b" }</span>
</code></pre>
<h2 id="reset">reset</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "dog"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "bird"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">reset</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">current</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "cat"</span>
</code></pre>
<h2 id="rsort">rsort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(5) [1]=> int(4) [2]=> int(2) [3]=> int(2) [4]=> int(1) [5]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(3) "dog" [1]=> string(3) "cat" [2]=> string(4) "bird" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> string(1) "5" [1]=> int(4) [2]=> string(1) "2" [3]=> int(2) [4]=> string(1) "1" [5]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'1dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'0bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(4) "2cat" [1]=> string(4) "1dog" [2]=> string(5) "0bird" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(5) [1]=> int(4) [2]=> int(22) [3]=> int(20) [4]=> int(1) [5]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(5) [1]=> int(4) [2]=> int(22) [3]=> int(20) [4]=> int(1) [5]=> int(0) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat10'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(5) "cat12" [1]=> string(5) "cat10" [2]=> string(4) "cat2" [3]=> string(4) "cat1" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(5) "cat20" [1]=> string(4) "cat2" [2]=> string(4) "Cat3" [3]=> string(4) "Cat1" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(4) "Cat3" [1]=> string(5) "cat20" [2]=> string(4) "cat2" [3]=> string(4) "Cat1" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'a'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'c'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'d'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rsort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(5) "cat20" [1]=> string(4) "Cat3" [2]=> string(4) "cat2" [3]=> string(4) "Cat1" }</span>
</code></pre>
<h2 id="shuffle">shuffle</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">shuffle</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">shuffle</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">shuffle</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="sizeof">sizeof</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sizeof</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sizeof</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sizeof</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sizeof</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token constant">COUNT_RECURSIVE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(7)</span>
</code></pre>
<h2 id="sort">sort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(4) "bird" [1]=> string(3) "cat" [2]=> string(3) "dog" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'2'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'5'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'1'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_REGULAR</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> string(1) "1" [2]=> string(1) "2" [3]=> int(2) [4]=> int(4) [5]=> string(1) "5" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'2cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'1dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'0bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NUMERIC</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(5) "0bird" [1]=> string(4) "1dog" [2]=> string(4) "2cat" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(20) [3]=> int(22) [4]=> int(4) [5]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_LOCALE_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(20) [3]=> int(22) [4]=> int(4) [5]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat10'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(4) "cat1" [1]=> string(4) "cat2" [2]=> string(5) "cat10" [3]=> string(5) "cat12" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(4) "Cat1" [1]=> string(4) "Cat3" [2]=> string(4) "cat2" [3]=> string(5) "cat20" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_STRING</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(4) "Cat1" [1]=> string(4) "cat2" [2]=> string(5) "cat20" [3]=> string(4) "Cat3" }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat2'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'Cat3'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'cat20'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token constant">SORT_NATURAL</span> <span class="token operator">|</span> <span class="token constant">SORT_FLAG_CASE</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(4) { [0]=> string(4) "Cat1" [1]=> string(4) "cat2" [2]=> string(4) "Cat3" [3]=> string(5) "cat20" }</span>
</code></pre>
<h2 id="uasort">uasort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Sort in ascending order.
*
* @param int $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token variable">$a</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator"><=</span><span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Sort in descending order.
*
* @param int $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>int <span class="token variable">$a</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token operator">-</span><span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator"><=</span><span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">uasort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [3]=> int(0) [4]=> int(1) [0]=> int(2) [5]=> int(2) [1]=> int(4) [2]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">uasort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [2]=> int(5) [1]=> int(4) [0]=> int(2) [5]=> int(2) [4]=> int(1) [3]=> int(0) }</span>
</code></pre>
<h2 id="uksort">uksort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Sort in ascending order.
*
* @param int $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token variable">$a</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator"><=</span><span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Sort in descending order.
*
* @param int $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>int <span class="token variable">$a</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token operator">-</span><span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator"><=</span><span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">uksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(2) [1]=> int(4) [2]=> int(5) [3]=> int(0) [4]=> int(1) [5]=> int(2) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">uksort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [5]=> int(2) [4]=> int(1) [3]=> int(0) [2]=> int(5) [1]=> int(4) [0]=> int(2) }</span>
</code></pre>
<h2 id="usort">usort</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Sort in ascending order.
*
* @param int $a
* @param int $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span>int <span class="token variable">$a</span><span class="token punctuation">,</span> int <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token variable">$a</span> <span class="token operator"><=</span><span class="token operator">></span> <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**
* Sort by string.
*
* @param string $a
* @param string $b
* @return int
*/</span>
<span class="token keyword">function</span> <span class="token function">bar</span><span class="token punctuation">(</span>string <span class="token variable">$a</span><span class="token punctuation">,</span> string <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">:</span> int
<span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token function">strcmp</span><span class="token punctuation">(</span><span class="token variable">$a</span><span class="token punctuation">,</span> <span class="token variable">$b</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">usort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(6) { [0]=> int(0) [1]=> int(1) [2]=> int(2) [3]=> int(2) [4]=> int(4) [5]=> int(5) }</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'cat'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'dog'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bird'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">usort</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$foo</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(4) "bird" [1]=> string(3) "cat" [2]=> string(3) "dog" }</span>
</code></pre>
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