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<h1 id="数学">数学</h1>
<ul>
<li><a href="#abs">abs - 绝对值</a></li>
<li><a href="#acos">acos - 反余弦</a></li>
<li><a href="#acosh">acosh - 反双曲余弦</a></li>
<li><a href="#asin">asin - 反正弦</a></li>
<li><a href="#asinh">asinh - 反双曲正弦</a></li>
<li><a href="#atan2">atan2 - 两个参数的反正切</a></li>
<li><a href="#atan">atan - 反正切</a></li>
<li><a href="#atanh">atanh - 反双曲正切</a></li>
<li><a href="#baseconvert">base_convert - 在任意进制之间转换数字</a></li>
<li><a href="#bindec">bindec - 二进制转换为十进制</a></li>
<li><a href="#ceil">ceil - 向上取整</a></li>
<li><a href="#cos">cos - 余弦</a></li>
<li><a href="#cosh">cosh - 双曲余弦</a></li>
<li><a href="#decbin">decbin - 十进制转换为二进制</a></li>
<li><a href="#dechex">dechex - 十进制转换为十六进制</a></li>
<li><a href="#decoct">decoct - 十进制转换为八进制</a></li>
<li><a href="#deg2rad">deg2rad - 将角度转换为弧度</a></li>
<li><a href="#exp">exp - 计算 e 的指数</a></li>
<li><a href="#expm1">expm1 - 返回 exp(number) - 1 ，甚至当 number 的值接近零也能计算出准确结果</a></li>
<li><a href="#floor">floor - 向下取整</a></li>
<li><a href="#fmod">fmod - 返回除法的浮点数余数</a></li>
<li><a href="#getrandmax">getrandmax - 获取随机数最大的可能值</a></li>
<li><a href="#hexdec">hexdec - 十六进制转换为十进制</a></li>
<li><a href="#hypot">hypot - 计算直角三角形的斜边长度</a></li>
<li><a href="#intdiv">intdiv - 对除法结果取整</a></li>
<li><a href="#isfinite">is_finite - 判断是否为有限值</a></li>
<li><a href="#isinfinite">is_infinite - 判断是否为无限值</a></li>
<li><a href="#isnan">is_nan - 判断是否为合法数值</a></li>
<li><a href="#lcgvalue">lcg_value - 组合线性同余发生器</a></li>
<li><a href="#log10">log10 - 以 10 为底的对数</a></li>
<li><a href="#log1p">log1p - 返回 log(1 + number) ，甚至当 number 的值接近零也能计算出准确结果</a></li>
<li><a href="#log">log - 自然对数</a></li>
<li><a href="#max">max - 找出最大值</a></li>
<li><a href="#min">min - 找出最小值</a></li>
<li><a href="#mtgetrandmax">mt_getrandmax - 获取随机数最大的可能值</a></li>
<li><a href="#mtrand">mt_rand - 生成更好的随机数</a></li>
<li><a href="#mtsrand">mt_srand - 播下一个更好的随机数发生器种子</a></li>
<li><a href="#octdec">octdec - 八进制转换为十进制</a></li>
<li><a href="#pi">pi - 获取圆周率值</a></li>
<li><a href="#pow">pow - 指数表达式</a></li>
<li><a href="#rad2deg">rad2deg - 将弧度转换为角度</a></li>
<li><a href="#rand">rand - 产生一个随机整数</a></li>
<li><a href="#round">round - 对浮点数进行四舍五入</a></li>
<li><a href="#sin">sin - 正弦</a></li>
<li><a href="#sinh">sinh - 双曲正弦</a></li>
<li><a href="#sqrt">sqrt - 平方根</a></li>
<li><a href="#srand">srand - 播下随机数发生器种子</a></li>
<li><a href="#tan">tan - 正切</a></li>
<li><a href="#tanh">tanh - 双曲正切</a></li>
</ul>
<h2 id="abs">abs</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">abs</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">4.2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(4.2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">abs</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">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">abs</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(5)</span>
</code></pre>
<h2 id="acos">acos</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">acos</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">// float(3.1415926535898)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">acos</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">// float(1.5707963267949)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">acos</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">// float(0)</span>
</code></pre>
<h2 id="acosh">acosh</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">acosh</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">acosh</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">// float(2.9932228461264)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">acosh</span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(3.6882538673613)</span>
</code></pre>
<h2 id="asin">asin</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">asin</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">// float(-1.5707963267949)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asin</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asin</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">// float(1.5707963267949)</span>
</code></pre>
<h2 id="asinh">asinh</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">asinh</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">// float(-0.88137358701954)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asinh</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">asinh</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">// float(0.88137358701954)</span>
</code></pre>
<h2 id="atan2">atan2</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">atan2</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 punctuation">;</span> <span class="token comment">// float(-2.3561944901923)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">atan2</span><span class="token punctuation">(</span><span class="token number">1</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">// float(0.78539816339745)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">atan2</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(0.46364760900081)</span>
</code></pre>
<h2 id="atan">atan</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">atan</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">// float(-0.78539816339745)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">atan</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">atan</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">// float(0.78539816339745)</span>
</code></pre>
<h2 id="atanh">atanh</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">atanh</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">0.5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(-0.54930614433405)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">atanh</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">atanh</span><span class="token punctuation">(</span><span class="token number">0.5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(0.54930614433405)</span>
</code></pre>
<h2 id="baseconvert">base_convert</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">base_convert</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'11'</span><span class="token punctuation">,</span> <span class="token number">2</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">// string(1) "3"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">base_convert</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'0031'</span><span class="token punctuation">,</span> <span class="token number">8</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">// string(2) "25"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">base_convert</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'A37334'</span><span class="token punctuation">,</span> <span class="token number">16</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">// string(24) "101000110111001100110100"</span>
</code></pre>
<h2 id="bindec">bindec</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">bindec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'11'</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">bindec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'110011'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(51)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">bindec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'111111'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(63)</span>
</code></pre>
<h2 id="ceil">ceil</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">ceil</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">3.14</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(-3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ceil</span><span class="token punctuation">(</span><span class="token number">4.3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(5)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ceil</span><span class="token punctuation">(</span><span class="token number">9.999</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(10)</span>
</code></pre>
<h2 id="cos">cos</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">cos</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">// float(0.54030230586814)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">cos</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">// float(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">cos</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">// float(0.54030230586814)</span>
</code></pre>
<h2 id="cosh">cosh</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">cosh</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">// float(1.5430806348152)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">cosh</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">// float(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">cosh</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">// float(1.5430806348152)</span>
</code></pre>
<h2 id="decbin">decbin</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">decbin</span><span class="token punctuation">(</span><span class="token number">11</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "1011"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">decbin</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "1100"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">decbin</span><span class="token punctuation">(</span><span class="token number">26</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "11010"</span>
</code></pre>
<h2 id="dechex">dechex</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">dechex</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">// string(1) "a"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">dechex</span><span class="token punctuation">(</span><span class="token number">47</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "2f"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">dechex</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "64"</span>
</code></pre>
<h2 id="decoct">decoct</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">decoct</span><span class="token punctuation">(</span><span class="token number">15</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "17"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">decoct</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "144"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">decoct</span><span class="token punctuation">(</span><span class="token number">264</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "410"</span>
</code></pre>
<h2 id="deg2rad">deg2rad</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">deg2rad</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">// float(0.5235987755983)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">deg2rad</span><span class="token punctuation">(</span><span class="token number">90</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(1.5707963267949)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">deg2rad</span><span class="token punctuation">(</span><span class="token number">180</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(3.1415926535898)</span>
</code></pre>
<h2 id="exp">exp</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">exp</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">// float(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">exp</span><span class="token punctuation">(</span><span class="token number">5.7</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(298.86740096706)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">exp</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(162754.791419)</span>
</code></pre>
<h2 id="expm1">expm1</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">expm1</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">expm1</span><span class="token punctuation">(</span><span class="token number">5.7</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(297.86740096706)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">expm1</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(162753.791419)</span>
</code></pre>
<h2 id="floor">floor</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">floor</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">3.14</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(-4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">floor</span><span class="token punctuation">(</span><span class="token number">4.3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">floor</span><span class="token punctuation">(</span><span class="token number">9.999</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(9)</span>
</code></pre>
<h2 id="fmod">fmod</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">fmod</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(-1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">fmod</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 comment">// float(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">fmod</span><span class="token punctuation">(</span><span class="token number">5.7</span><span class="token punctuation">,</span> <span class="token number">1.3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(0.5)</span>
</code></pre>
<h2 id="getrandmax">getrandmax</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">getrandmax</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="hexdec">hexdec</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">hexdec</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 punctuation">;</span> <span class="token comment">// int(10)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hexdec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'a0'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(160)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hexdec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'ee'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(238)</span>
</code></pre>
<h2 id="hypot">hypot</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">hypot</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 comment">// float(2.2360679774998)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hypot</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 punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(3.605551275464)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hypot</span><span class="token punctuation">(</span><span class="token number">3</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 comment">// float(5)</span>
</code></pre>
<h2 id="intdiv">intdiv</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">intdiv</span><span class="token punctuation">(</span><span class="token operator">-</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 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">intdiv</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">3</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(-1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">intdiv</span><span class="token punctuation">(</span><span class="token number">3</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(1)</span>
</code></pre>
<h2 id="isfinite">is_finite</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">is_finite</span><span class="token punctuation">(</span><span class="token function">log</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">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">is_finite</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">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">is_finite</span><span class="token punctuation">(</span><span class="token number">100</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="isinfinite">is_infinite</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">is_infinite</span><span class="token punctuation">(</span><span class="token function">log</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">// bool(true)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">is_infinite</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">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">is_infinite</span><span class="token punctuation">(</span><span class="token number">100</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="isnan">is_nan</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">is_nan</span><span class="token punctuation">(</span><span class="token function">acos</span><span class="token punctuation">(</span><span class="token number">8</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">is_nan</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(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">is_nan</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(false)</span>
</code></pre>
<h2 id="lcgvalue">lcg_value</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">lcg_value</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="log10">log10</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">log10</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">log10</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">// float(0.30102999566398)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">log10</span><span class="token punctuation">(</span><span class="token number">2.7183</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(0.43429738512451)</span>
</code></pre>
<h2 id="log1p">log1p</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">log1p</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">log1p</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">// float(0.69314718055995)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">log1p</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">// float(1.0986122886681)</span>
</code></pre>
<h2 id="log">log</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">log</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">log</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 comment">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token number">2</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">// float(1)</span>
</code></pre>
<h2 id="max">max</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">max</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(7)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">max</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(5)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">max</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'hello'</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">// string(5) "hello"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">max</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'hello'</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">max</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'42'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "42"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">max</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">8</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">5</span><span class="token punctuation">,</span> <span class="token number">7</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(5) [2]=> int(7) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">max</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">2</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">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</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 punctuation">;</span> <span class="token comment">// array(4) { [0]=> int(1) [1]=> int(1) [2]=> int(1) [3]=> int(1) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">max</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'hello'</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">5</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">42</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(5) [2]=> int(7) }</span>
</code></pre>
<h2 id="min">min</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">min</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">1</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">7</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">min</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">min</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'hello'</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">// string(5) "hello"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">min</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'hello'</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">min</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'42'</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">// int(-1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">min</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">8</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">5</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 punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(8) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">min</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">2</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">1</span><span class="token punctuation">,</span> <span class="token number">1</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 punctuation">;</span> <span class="token comment">// array(3) { [0]=> int(2) [1]=> int(2) [2]=> int(2) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">min</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'hello'</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">5</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">42</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "hello"</span>
</code></pre>
<h2 id="mtgetrandmax">mt_getrandmax</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">mt_getrandmax</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="mtrand">mt_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">mt_rand</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">mt_rand</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">15</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="mtsrand">mt_srand</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">mt_srand</span><span class="token punctuation">(</span><span class="token punctuation">(</span>int<span class="token punctuation">)</span> <span class="token punctuation">(</span><span class="token function">microtime</span><span class="token punctuation">(</span><span class="token boolean constant">true</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token number">10000</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="octdec">octdec</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">octdec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'77'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(63)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">octdec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'100'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(64)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">octdec</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'777'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(511)</span>
</code></pre>
<h2 id="pi">pi</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">pi</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(3.1415926535898)</span>
</code></pre>
<h2 id="pow">pow</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">pow</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 comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">pow</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 number">20</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">pow</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(256)</span>
</code></pre>
<h2 id="rad2deg">rad2deg</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">rad2deg</span><span class="token punctuation">(</span><span class="token number">0.5235987755983</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(30)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rad2deg</span><span class="token punctuation">(</span><span class="token number">1.5707963267949</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(90)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rad2deg</span><span class="token punctuation">(</span><span class="token number">3.1415926535898</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(180)</span>
</code></pre>
<h2 id="rand">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">rand</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">rand</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">15</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="round">round</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">round</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 comment">// float(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">3.5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">3.6</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">// float(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">1.95583</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">// float(1.96)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">1241757</span><span class="token punctuation">,</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 punctuation">;</span> <span class="token comment">// float(1242000)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">9.5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token constant">PHP_ROUND_HALF_UP</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(10)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">9.5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token constant">PHP_ROUND_HALF_DOWN</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(9)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">9.5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token constant">PHP_ROUND_HALF_EVEN</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(10)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">9.5</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token constant">PHP_ROUND_HALF_ODD</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(9)</span>
</code></pre>
<h2 id="sin">sin</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">sin</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">// float(-0.8414709848079)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sin</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sin</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">// float(0.8414709848079)</span>
</code></pre>
<h2 id="sinh">sinh</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">sinh</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">// float(-1.1752011936438)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sinh</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sinh</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">// float(1.1752011936438)</span>
</code></pre>
<h2 id="sqrt">sqrt</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">sqrt</span><span class="token punctuation">(</span><span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(2.8284271247462)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sqrt</span><span class="token punctuation">(</span><span class="token number">9</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// float(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sqrt</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">// float(3.1622776601684)</span>
</code></pre>
<h2 id="srand">srand</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">srand</span><span class="token punctuation">(</span><span class="token punctuation">(</span>int<span class="token punctuation">)</span> <span class="token punctuation">(</span><span class="token function">microtime</span><span class="token punctuation">(</span><span class="token boolean constant">true</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token number">10000</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="tan">tan</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">tan</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">// float(-1.5574077246549)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">tan</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">tan</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">// float(1.5574077246549)</span>
</code></pre>
<h2 id="tanh">tanh</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">tanh</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">// float(-0.76159415595576)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">tanh</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">// float(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">tanh</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">// float(0.76159415595576)</span>
</code></pre>
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