Python regular expression again - match url part II

Ok. I get regexp from here开发者_开发问答 (only WWW links, second version). Everything is fine, except one thing, it parse BBCode too.

Regexp

(?i)\b((?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))

What fails

[img]http://example.foo/something.png[/img]

When I apply regexp I get http://example.foo/something.png[/img and that's fail. :P Any regexp guru there?

This is a little rough, but try this:

$preg = "%(?:https?://|www\d{0,3}.)(?:[\/A-Za-z0-9-_.]+(?!(?:<|\[/([A-Za-z0-9])+?\1)))%";

I've tested it and it should work as expected if I understood your question correctly.