正则表达式的子模式详解
<div id="cnblogs_post_body">首先，我们先看一段PHP代码：<div class="cnblogs_code"><?php $time = date ("Y-m-d H:i:s"); $pattern = "/\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}/i"; if(preg_match($pattern,$time,$arr)){ echo "<pre>"; print_r($arr); echo "</pre>"; }?>
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