Checks whether a web site has feeds if so, grabs its url returns false otherwise

getFeedUrls.php

/**
 * Checks whether a web site has feeds
 * if so, grabs its url returns false otherwise
 * @author Junaid Qadir baloch
 * @version 0.1 11:12 PM 7/25/2011 
 * @param sting $url
 * @return boolean
 */
function getFeedUrls($url)
{
	$domDoc = new DOMDocument ( "1.0", "UTF-8" );
	$nodeList = new DOMNodeList ();
	
	/**
	 * @$domDoc->loadHTMLFile ( $url ))
	 *  (@) is used to suppress the errors
	 *  that may occur due to invalid html on the page 
	 */
	if (@$domDoc->loadHTMLFile ( $url )) 
	{
		$content = $domDoc->saveHTMLFile ( "cache.html" );
		$expression = '//link [@rel="alternate"]'; // [@rel=\"alternate\"]";
		$domXPath = new DOMXPath ( $domDoc );
		
		$elements = $domXPath->query ( $expression );
		$feedUrls = array ();
		foreach ( $elements as $element )
		{
			if ($element->hasAttributes ())
			{
				foreach ( $element->attributes as $attribute )
				{
					if ($attribute->nodeName == "href")
					{
						$feedUrls [] = $attribute->nodeValue;
					}
				}
			}
		}
	} else
	{
		return FALSE;
	}
	return $feedUrls;

}