ereg_replace

I'm using ereg_replace to find urls as said in the manual. I've changed it a tiny litte bit to remove the http:// part when displaying the link, like this: $str = ereg_replace("([[:alpha:]]+://)([^<>[:space:]]+[[:alnum:]/])","<a href='\\0' class='red' target='_blank' onfocus='this.blur()'>\\2</a>", $str); I'm trying to get the grips of regular expressions but I can't figure this one out; If the url includes a query-string I don't want it to be shown. So the url http://www.elstudion.com/index.php?foo=bar should be replaced with: <a href='http://www.elstudion.com/index.php?foo=bar'>www.elstudion.com/index.ph p</a> How do I do this? Thanks! .bobo