I'm using the following regular expression in PHP to match png and jpg URLs with unusual characters like parentheses, commas and some international characters in them:

 #http://[a-z\dçñ_(),.%&\-+/\s]+(png|jpe?g)#i';

Is there a simpler regular expression to do the same?

Thanks in advance

Just a guess on the limited details given:

(?is)(?<=(["']))http://(?:(?!\1).)*?(?:\.(?:jpe?g|gif|png))(?=\1)

I can't get your regular expression to work with preg_match. It gives me following error:

"reference to non-existent subpattern at offset 39"

I just need a regular expression that matches strings like:

http://domain:optionalport/filename path with any kind of character in it (not only alphanumeric characters).jpg or png extension

Possibly a code issue, please try this code:

<?php
$sourcestring='test<img src="HTTP://test/test.jpg">test';
preg_match_all('#(?is)(?<=(["\']))http://(?:(?!\1).)*?(?:\.(?:jpe?g|png))(?=\1)#',$sourcestring,$matches);
echo "<pre>".print_r($matches,true);
?>