学步园

<?php 
$str='<p><img border="0" src="upfiles/2009/07/1246430143_1.jpg" alt=""/></p>'; 
$pattern="/<[img|IMG].*?src=[\'|\"](.*?(?:[\.gif|\.jpg]))[\'|\"].*?[\/]?>/"; 
preg_match_all($pattern,$str,$match); 
print_r($match); 
?> 

结果显示： 

Array( 
[0] => Array([0] => <img border="0" src="upfiles/2009/07/1246430143_1.jpg" alt=""/>) 
[1] => Array([0] => upfiles/2009/07/1246430143_1.jpg) 
)