preg_grep

实例

从数组中获取以 "p" 开头的项：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$input</span> <span class="token operator">=</span> <span class="token punctuation">[</span>
  <span class="token string double-quoted-string">"Red"</span><span class="token punctuation">,</span>
  <span class="token string double-quoted-string">"Pink"</span><span class="token punctuation">,</span>
  <span class="token string double-quoted-string">"Green"</span><span class="token punctuation">,</span>
  <span class="token string double-quoted-string">"Blue"</span><span class="token punctuation">,</span>
  <span class="token string double-quoted-string">"Purple"</span>
<span class="token punctuation">]</span><span class="token punctuation">;</span>

<span class="token variable">$result</span> <span class="token operator">=</span> <span class="token function">preg_grep</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"/^p/i"</span><span class="token punctuation">,</span> <span class="token variable">$input</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">print_r</span><span class="token punctuation">(</span><span class="token variable">$result</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

亲自试一试