isolating a http

[Anon]

im making a forum and i want the user not to be able to use HTML tags. although, i want them to be able to use my special forum tags (similar to ultimate bulletin board) to post a URL. how can i isolate the http://www.yahoo.com inside the [link][/link] tags.

[link]http://www.yahoo.com[/link]

I want that tag (inputed by the user) to, when submitted, turn into

<a href="http://www.yahoo.com">http://www.yahoo.com</a>

in order to do this i need to isolate the http://www.yahoo.com i figure this is easiest to do using the ereg function, im not sure how that works. Could someone please show me how they would do it.

[alcapone]

hello there,
I would probably go ahead and trancfer everything into url with this:

<?php
$url='welcome to http://www.yahoo.com';
$url=eregi_replace("((http|mailto|ftp):\/\/[^{[:space:]<>]{1,})",} "<a href='\1'>\1</a>",$url);
print $url;
?>

cheers,
AlCapone

[Anon]

excellent thanks