help with preg_replace for http://

I'm writing a knowledgebase (basically a content management system) application where people are adding text via web forms then viewing this data on the web. standard bread-and-butter kind of stuff. of course people want to put in their hyperlinks in the page w/o having to do any sort of html coding. I'm having a hard time getting my regular expression to work correctly to match for anything that starts with http:// and ends with a space character, extracting this as a $string, then formatting the hyperlink as <a href="$string">$string</a> on the knowledgebase viewing scripts. The one I've written matches and replaces only the first instance of http:// in the string. (which solves problems as long as there is only one hyperlink in the page ;-) thanks kevin Kevin Won ------------------------------------------------------------- ITG Web Developer, Systems Administrator Oregon Health Sciences University (503) 418-4282 cell: (503) 913-5367 page: x15897 fax: (503) 494-1888