- var_dump: documentation ( source)
- preg_match_all: documentation ( source)
<?php
$pat="|<img.?src=\'\"[\'\"].?>|i";
$content = <<< LOL
<img src="http://img.dewen.org/upload/avatar/010/128/696/user_10128696_avatar_1384404591_r.png" id="top_avatar">
<span class="name" title="mdep, mga_dependent@163.com">我<i></i></span>
<img src="http://img.dewen.org/upload/avatar/010/128/696/user_10128696_avatar_1384404591_r.png" id="top_avatar" class="icons" title="mdep, mga_dependent@163.com">
<span class="name" title="mdep, mga_dependent@163.com">我<i></i></span>
LOL;
preg_match_all('|<img.?src=\'"[\'"].?>|i', $content, $images);
var_dump($content);
var_dump($images);