Get URLS out of String

[mattee]

I know this should be pretty easy, but I'm having a hard time coming up with a preg that matches the urls with hrefs within a document.

I just want the part inside the href, not the whole tag.

<a href=""></a>

If you've figured this one out, please let me know. Many thanks!
Matt.

[Anon]

$temp = explode ("\"",$unparsed_url);
$url = $temp[1];