Php : Get links on a page with DomDocument

Scraper scripts often need to extract all links on a given page. This can be done in a number of ways like regex, domdocument etc.
Here is simple code snippet to do this using domdocument.

/*
Function to get all links on a certain url using the DomDocument
*/

function get_links($link)
{
	//return array
	$ret = array();
	
	/*** a new dom object ***/
	$dom = new domDocument;
	
	/*** get the HTML (suppress errors) ***/
	@$dom->loadHTML(file_get_contents($link));
	
	/*** remove silly white space ***/
	$dom->preserveWhiteSpace = false;
	
	/*** get the links from the HTML ***/
	$links = $dom->getElementsByTagName('a');
	
	/*** loop over the links ***/
	foreach ($links as $tag)
	{
		$ret[$tag->getAttribute('href')] = $tag->childNodes->item(0)->nodeValue;
	}
	
	return $ret;
}


//Link to open and search for links
$link = "http://www.php.net";

/*** get the links ***/
$urls = get_links($link);

/*** check for results ***/
if(sizeof($urls) > 0)
{
	foreach($urls as $key=>$value)
	{
		echo $key . ' - '. $value . '<br >';
	}
}
else
{
	echo "No links found at $link";
}