Parse a URL from a link

Let's say I have a string:

$link = "<a href=\"http://domainname.com/page.php\">This is my page.</a>";

What I want to do is snag the url out of that string without anything else. Outputting:

$url = "http://domainname.com/page.php";

Does anyone know how this could be done?

Thanks in advance.

 

$link = "<a href=\"http://domainname.com/page.php\">This is my page.</a>";

if (ereg('\"(.*)\"',$link,$out)){$url=$out[0];}

dont verify true