<?php
$c="<html>
<table>
<tr>
<td>feicemc.php?id=fdsfds&str=33333dd</td>
</tr>
</table>
</html>";preg_match_all("/33333dd/","$c",$c_match,PREG_PATTERN_ORDER);
print_r($c_match);
?>
$c="<html>
<table>
<tr>
<td>feicemc.php?id=fdsfds&str=33333dd</td>
</tr>
</table>
</html>";preg_match_all("/33333dd/","$c",$c_match,PREG_PATTERN_ORDER);
print_r($c_match);
?>
preg_match("/str=(.+)<\/td>/isU",$str",$out);
echo $out[1];