preg_match_all href|src function

Hi All, I have being working on PHP perl compaitable regular expressions for the last month and cannot work out how to program a preg_match_all that will get the "file.html" from the following examples: <a href="file.html"> <a href='file.html'> <a href=file.html> <frame src="file.html"> <frame src='file.html'> <frame src=file.html> The preg_match_all I have below only works for <a href="file.html"> but not for the other variations... preg_match_all("|href=\"?([^\"' >]+)|i", $data, $links); I tried the preg_match_all below, but that didn't work... preg_match_all("|(href|src)=([^\"']+)?([^\"' >]+)|i", $data, $links); Any help would be greatly appreciated. Regards, Michael.