preg_filter

名称:preg_filter

分类:正则处理PCRE

所属语言:php

一句话介绍:返回已替换模式匹配项的字符串或数组，但前提是找到匹配项。

实例

在字符串列表中将数字用括号括起来：

<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">"现在是 5 点钟"</span><span class="token punctuation">,</span>  
  <span class="token string double-quoted-string">"40 天"</span><span class="token punctuation">,</span>  
  <span class="token string double-quoted-string">"这里没有数字"</span><span class="token punctuation">,</span>  
  <span class="token string double-quoted-string">"在 2000 年"</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_filter</span><span class="token punctuation">(</span><span class="token string single-quoted-string">'/[0-9]+/'</span><span class="token punctuation">,</span> <span class="token string single-quoted-string">'($0)'</span><span class="token punctuation">,</span> <span class="token variable">$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