PHP Regex for different URLs?

Here you go: (?:http:\/\/www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\. |http:\/\/|www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\. )(?:youtube\.

Com\/watch\? V=(?:\w+)|domain\. Com\/image.(?:jpg|png|gif)|domain\.

Com) Or with delimiters: ~(?:http:\/\/www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\. |http:\/\/|www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\" rel="nofollow">www\. )(?:youtube\.

Com\/watch\? V=(?:\w+)|domain\. Com\/image.(?:jpg|png|gif)|domain\.

Com)~i You can test the above RegExs @ Robular. To find out if the URLs are inside unwanted HTML tags I suggest you use a DOM parser. Also, check out this related question: How to mimic StackOverflow Auto-Link Behavior.

Regarding the YouTube replacement you can do something like this: echo preg_replace('~youtube\. Com\/watch\? V=(\w+)~i', 'embed code $1', $comments'message').

This is quite straight-forward. Anyways +1 for compiling it correctly :-P – Boldewyn Jan 11 '10 at 7:40.

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