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declare
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require
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require_once
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include_once
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函数
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返回值
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可变函数
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类与对象
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构造函数和析构函数
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对象继承
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抽象类
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对象接口
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Trait
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遍历对象
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魔术方法
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Final 关键字
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对象比较
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<a href="../../.." >PHP 选项和信息</a>
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<h1 id="php-选项和信息">PHP 选项和信息</h1>
<ul>
<li><a href="#assertoptions">assert_options - 设置 / 获取断言的各种标志</a></li>
<li><a href="#assert">assert - 检查一个断言是否为 false</a></li>
<li><a href="#cligetprocesstitle">cli_get_process_title - 返回当前进程的标题</a></li>
<li><a href="#clisetprocesstitle">cli_set_process_title - 设置进程标题</a></li>
<li><a href="#extensionloaded">extension_loaded - 检查一个扩展是否已经加载</a></li>
<li><a href="#gccollectcycles">gc_collect_cycles - 强制收集所有现存的垃圾循环周期</a></li>
<li><a href="#gcdisable">gc_disable - 停用垃圾收集器</a></li>
<li><a href="#gcenable">gc_enable - 激活垃圾收集器</a></li>
<li><a href="#gcenabled">gc_enabled - 返回垃圾收集器的状态</a></li>
<li><a href="#gcmemcaches">gc_mem_caches - 回收 Zend Engine 内存管理器使用的内存</a></li>
<li><a href="#gcstatus">gc_status - 获取有关垃圾收集器的信息</a></li>
<li><a href="#getcfgvar">get_cfg_var - 获取 PHP 配置选项的值</a></li>
<li><a href="#getcurrentuser">get_current_user - 获取当前 PHP 脚本所有者名称</a></li>
<li><a href="#getdefinedconstants">get_defined_constants - 返回所有常量的关联数组，键是常量名，值是常量值</a></li>
<li><a href="#getextensionfuncs">get_extension_funcs - 返回模块函数名称的数组</a></li>
<li><a href="#getincludepath">get_include_path - 获取当前的 include_path 配置选项</a></li>
<li><a href="#getincludedfiles">get_included_files - 返回被 include 和 require 文件名的数组</a></li>
<li><a href="#getloadedextensions">get_loaded_extensions - 返回所有编译并加载模块名的数组</a></li>
<li><a href="#getrequiredfiles">get_required_files - 返回被 include 和 require 文件名的数组</a></li>
<li><a href="#getresources">get_resources - 返回活动的资源</a></li>
<li><a href="#getenv">getenv - 获取一个环境变量的值</a></li>
<li><a href="#getlastmod">getlastmod - 获取页面最后修改的时间</a></li>
<li><a href="#getmygid">getmygid - 获取当前 PHP 脚本拥有者的 GID</a></li>
<li><a href="#getmyinode">getmyinode - 获取当前脚本的索引节点</a></li>
<li><a href="#getmypid">getmypid - 获取 PHP 进程的 ID</a></li>
<li><a href="#getmyuid">getmyuid - 获取 PHP 脚本所有者的 UID</a></li>
<li><a href="#getopt">getopt - 从命令行参数列表中获取选项</a></li>
<li><a href="#getrusage">getrusage - 获取当前资源使用状况</a></li>
<li><a href="#inialter">ini_alter - 为一个配置选项设置值</a></li>
<li><a href="#inigetall">ini_get_all - 获取所有配置选项</a></li>
<li><a href="#iniget">ini_get - 获取一个配置选项的值</a></li>
<li><a href="#inirestore">ini_restore - 恢复配置选项的值</a></li>
<li><a href="#iniset">ini_set - 为一个配置选项设置值</a></li>
<li><a href="#memorygetpeakusage">memory_get_peak_usage - 返回分配给 PHP 内存的峰值</a></li>
<li><a href="#memorygetusage">memory_get_usage - 返回分配给 PHP 的内存量</a></li>
<li><a href="#phpiniloadedfile">php_ini_loaded_file - 取得已加载的 php.ini 文件的路径</a></li>
<li><a href="#phpiniscannedfiles">php_ini_scanned_files - 返回从额外 ini 目录里解析的 .ini 文件列表</a></li>
<li><a href="#phpsapiname">php_sapi_name - 返回 Web 服务器和 PHP 之间的接口类型</a></li>
<li><a href="#phpuname">php_uname - 返回运行 PHP 的系统的有关信息</a></li>
<li><a href="#phpcredits">phpcredits - 打印 PHP 贡献者名单</a></li>
<li><a href="#phpinfo">phpinfo - 输出关于 PHP 配置的信息</a></li>
<li><a href="#phpversion">phpversion - 获取当前的 PHP 版本</a></li>
<li><a href="#putenv">putenv - 设置环境变量的值</a></li>
<li><a href="#setincludepath">set_include_path - 设置 include_path 配置选项</a></li>
<li><a href="#settimelimit">set_time_limit - 设置脚本最大执行时间</a></li>
<li><a href="#sysgettempdir">sys_get_temp_dir - 返回用于临时文件的目录</a></li>
<li><a href="#versioncompare">version_compare - 对比两个 PHP 规范化的版本数字字符串</a></li>
<li><a href="#zendthreadid">zend_thread_id - 返回当前线程的唯一识别符</a></li>
<li><a href="#zendversion">zend_version - 获取当前 Zend 引擎的版本</a></li>
</ul>
<h2 id="assertoptions">assert_options</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token comment">/**
* Just a test function.
*
* @param void
* @return void
*/</span>
<span class="token keyword">function</span> <span class="token function">foo</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token keyword">echo</span> <span class="token single-quoted-string string">'Assert failed'</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">assert_options</span><span class="token punctuation">(</span><span class="token constant">ASSERT_ACTIVE</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 function">assert_options</span><span class="token punctuation">(</span><span class="token constant">ASSERT_WARNING</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 function">assert_options</span><span class="token punctuation">(</span><span class="token constant">ASSERT_BAIL</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 function">assert_options</span><span class="token punctuation">(</span><span class="token constant">ASSERT_QUIET_EVAL</span><span class="token punctuation">,</span> <span class="token boolean constant">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">assert_options</span><span class="token punctuation">(</span><span class="token constant">ASSERT_CALLBACK</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>
</code></pre>
<h2 id="assert">assert</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">assert</span><span class="token punctuation">(</span><span class="token boolean constant">true</span> <span class="token operator">==</span> <span class="token boolean constant">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// PHP Warning: assert(): assert(true == false) failed</span>
<span class="token function">assert</span><span class="token punctuation">(</span><span class="token boolean constant">true</span> <span class="token operator">==</span> <span class="token boolean constant">false</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'True is not false!'</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// PHP Warning: assert(): True is not false!</span>
<span class="token function">assert</span><span class="token punctuation">(</span><span class="token boolean constant">true</span> <span class="token operator">==</span> <span class="token boolean constant">false</span><span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">AssertionError</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'True is not false!'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// PHP Warning: assert(): AssertionError: True is not false!</span>
</code></pre>
<h2 id="cligetprocesstitle">cli_get_process_title</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">cli_get_process_title</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="clisetprocesstitle">cli_set_process_title</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">cli_set_process_title</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'Hello World!'</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="extensionloaded">extension_loaded</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">extension_loaded</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'mbstring'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="gccollectcycles">gc_collect_cycles</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">gc_collect_cycles</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="gcdisable">gc_disable</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">gc_disable</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="gcenable">gc_enable</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">gc_enable</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="gcenabled">gc_enabled</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">gc_enabled</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="gcmemcaches">gc_mem_caches</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">gc_mem_caches</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="gcstatus">gc_status</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">gc_status</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getcfgvar">get_cfg_var</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">get_cfg_var</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'display_errors'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getcurrentuser">get_current_user</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">get_current_user</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getdefinedconstants">get_defined_constants</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">get_defined_constants</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">get_defined_constants</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>
</code></pre>
<h2 id="getextensionfuncs">get_extension_funcs</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">get_extension_funcs</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'mbstring'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getincludepath">get_include_path</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">get_include_path</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getincludedfiles">get_included_files</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">get_included_files</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getloadedextensions">get_loaded_extensions</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">get_loaded_extensions</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">get_loaded_extensions</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>
</code></pre>
<h2 id="getrequiredfiles">get_required_files</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">get_required_files</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getresources">get_resources</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">get_resources</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">get_resources</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'stream'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getenv">getenv</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">getenv</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 function">var_dump</span><span class="token punctuation">(</span><span class="token function">getenv</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>
</code></pre>
<h2 id="getlastmod">getlastmod</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">getlastmod</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getmygid">getmygid</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">getmygid</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getmyinode">getmyinode</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">getmyinode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getmypid">getmypid</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">getmypid</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getmyuid">getmyuid</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">getmyuid</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getopt">getopt</h2>
<pre class="language-"><code>php example.php -a foo -b bar
</code></pre><p>当执行上面的命令时，会输出下面的结果：</p>
<pre class="language-"><code>array(2) {
["a"]=>
string(3) "foo"
["b"]=>
string(3) "bar"
}
</code></pre><p>上例中的 <code>example.php</code> 文件内容：</p>
<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">getopt</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'a:b:'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<hr>
<pre class="language-"><code>php example.php -a foo -b bar --baz baz --qux qux
</code></pre><p>当执行上面的命令时，会输出下面的结果：</p>
<pre class="language-"><code>array(4) {
["a"]=>
string(3) "foo"
["b"]=>
string(3) "bar"
["baz"]=>
string(3) "baz"
["qux"]=>
string(3) "qux"
}
</code></pre><p>上例中的 <code>example.php</code> 文件内容：</p>
<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">getopt</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'a:b:'</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 single-quoted-string string">'qux:'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="getrusage">getrusage</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">getrusage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="inialter">ini_alter</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">ini_alter</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'display_errors'</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 punctuation">;</span>
</code></pre>
<h2 id="inigetall">ini_get_all</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">ini_get_all</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">ini_get_all</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'mbstring'</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">ini_get_all</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'mbstring'</span><span class="token punctuation">,</span> <span class="token boolean constant">false</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="iniget">ini_get</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">ini_get</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'display_errors'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="inirestore">ini_restore</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">ini_set</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'display_errors'</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">ini_restore</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'display_errors'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="iniset">ini_set</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">ini_set</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'display_errors'</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 punctuation">;</span>
</code></pre>
<h2 id="memorygetpeakusage">memory_get_peak_usage</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">memory_get_peak_usage</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">memory_get_peak_usage</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>
</code></pre>
<h2 id="memorygetusage">memory_get_usage</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">memory_get_usage</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">memory_get_usage</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>
</code></pre>
<h2 id="phpiniloadedfile">php_ini_loaded_file</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">php_ini_loaded_file</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="phpiniscannedfiles">php_ini_scanned_files</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">php_ini_scanned_files</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="phpsapiname">php_sapi_name</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">php_sapi_name</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="phpuname">php_uname</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">php_uname</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="phpcredits">phpcredits</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">phpcredits</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="phpinfo">phpinfo</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_ALL</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_GENERAL</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_CREDITS</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_CONFIGURATION</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_MODULES</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_ENVIRONMENT</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_VARIABLES</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">phpinfo</span><span class="token punctuation">(</span><span class="token constant">INFO_LICENSE</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="phpversion">phpversion</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">phpversion</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">phpversion</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'mbstring'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="putenv">putenv</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">putenv</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo=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 function">putenv</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar=bar'</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="setincludepath">set_include_path</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">set_include_path</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="settimelimit">set_time_limit</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">set_time_limit</span><span class="token punctuation">(</span><span class="token number">30</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">set_time_limit</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">// bool(true)</span>
</code></pre>
<h2 id="sysgettempdir">sys_get_temp_dir</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">sys_get_temp_dir</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="versioncompare">version_compare</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">version_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'7.4.0'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.0'</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">version_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'7.4.1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.0'</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">version_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'7.4.0'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.1'</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">version_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'7.4.0'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.0'</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 comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">version_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'7.4.1'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.0'</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 comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">version_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'7.4.0'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.1'</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 comment">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">version_compare</span><span class="token punctuation">(</span><span class="token constant">PHP_VERSION</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'7.4.0'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="zendthreadid">zend_thread_id</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">zend_thread_id</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="zendversion">zend_version</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">zend_version</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
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