Grabbing Links from Web Page

[refined]

Alright, so basically, I need a function that takes a cURL output from a page and grabs links from inside of the page. The links are all from rapidshare.com, and are generally in this typical format:

 

http://rapidshare.com/files/3459349/etcetcetc.r00

http://rapidshare.com/files/81027576/blahblahblah234.rar

http://www.rapidshare.com/files/81027576/etcetcetc.rar

http://www.rapidshare.com/files/81027576/etdasflkjas.r00

 

These are essentially how the links work. I know how to code everything except for the regex that grabs the link for the page.

 

I've tried several things, including the classic:

function returnSubstrings($text, $openingMarker, $closingMarker) {
$openingMarkerLength = strlen($openingMarker);
$closingMarkerLength = strlen($closingMarker);
$result = array();
$position = 0;
while (($position = strpos($text, $openingMarker, $position)) !== false) {
	$position += $openingMarkerLength;
	if (($closingMarkerPosition = strpos($text, $closingMarker, $position)) !== false) {
		$result[] = substr($text, $position, $closingMarkerPosition - $position);
		$position = $closingMarkerPosition + $closingMarkerLength;
	}
}
return $result;
}
$cURLoutput = str_replace("www.rapidshare.com", "rapidshare.com", $cURLoutput);
$linkarray= returnSubstrings($cURLoutput, "http://rapidshare.com", ".rar");
$linkarray2= returnSubstrings($cURLoutput, "http://rapidshare.com", ".[0-9]");

 

Obviously, I left the cURL stuff out..

 

This is clearly not the most effective way to do this.. what is the best method?

 

Yeah, it's very ugly