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示例讲解PHP函数preg_grep()的使用

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Release： 2016-06-13 11:07:57
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我们今天为大家介绍的PHP函数preg_grep()就是PHP语言中，众多功能强大的函数之一，希望大家在阅读后能够对这一函数优异个深刻的认识。

函数原型：array preg_grep (string $pattern, array $input)
PHP函数preg_grep()返回一个数组，其中包括了$input数组中与给定的$pattern模式相匹配的单元。对于输入数组$input中的每个元素，preg_grep()也只进行一次匹配。代码6.3给出的示例简单地说明了preg_grep()函数的使用。

PHP函数preg_grep()代码6.3 数组查询匹配

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php  </span></span></span></li>
<li>
<span>$</span><span class="attribute">subjects</span><span> = </span><span class="attribute-value">array</span><span>(  </span>
</li>
<li class="alt"><span>"Mechanical Engineering", "Medicine",  </span></li>
<li><span>"Social Science", "Agriculture",  </span></li>
<li class="alt"><span>"Commercial Science", "Politics"  </span></li>
<li><span>);  </span></li>
<li class="alt"><span>//匹配所有仅由有一个单词组成的科目名  </span></li>
<li>
<span>$</span><span class="attribute">alonewords</span><span> = </span><span class="attribute-value">preg_grep</span><span>("/^[a-z]*$/i"<br>, $subjects);  </span>
</li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
</ol>
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通过以上这段PHP函数preg_grep()的代码示例，希望能够为读者起到一个加深印象的作用。


Related labels：
grep php for introduce use function us of Example explain
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