PHP提取字符串中的图片地址[正则表达式]

<?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
)
)