php中正则表达式从html代码中获取图片路径

<?php
  $test = '<p>444<img height="768" width="1024" alt="" src="/uploadfiles/28/Tree.jpg" /></p>
   <p>444<img height="768" width="1024" alt="" src="/uploadfiles/sf/Tree.jpg" /></p>
   fsdafasdfasdfasdf
   <p>444<img height="768" width="1024" alt="" src="/uploadfiles/28/elm.jpg" /></p>

sdfasdfasdf<p>
   <p>444<img height="768" width="1024" alt="" src="/uploadfiles/28/maple.jpg" /></p>

sdf32414撒旦发是否 
   <p>444<img height="768" width="1024" alt="" src="/uploadfiles/40/Tree.jpg" /></p>';

  preg_match_all("/<p>.*src=\"([^^]*?)\".*<\/p>/i",$test,$match);
  print_r($match[1]);
?>

这样应该可以，我试的多行的，中间还夹杂一些字符，没什么问题，呵呵