Cache_Lite error handling

[upgrader]

Hi there, I have this code to retrieve statistics from a page and cache them. The problem is when the site I am accessing goes down it just outputs a php error as expected. How can I rewrite this code so that if it doesn't manage to retrieve data from the site because it is down or it can't find the items it needs, it will display the last cached result instead?

 

require_once("Lite.php");

$objCache = new Cache_Lite( array("cacheDir" => "cache/", "lifeTime" =>
							300) );


if ($top3 = $objCache->get("top3")) 
{
	// Debug: $top3 .= "<li>[Cached Result]</li>";
	echo $top3;
}
else 
{		
	$html = file_get_contents('http://badhausen.hlstatsx.com/?mode=players&game=css'); 
	$dom = new domDocument;
	$dom->loadHTML($html);
	$dom->preserveWhiteSpace = false;

	$x = new DomXPath($dom);

	$results = $x->query('//table/tr[position() >= 2 and position() <= 4]/td[2]/font/a');

	foreach ($results as $result) {
		$top3 .= "<li>".$result->nodeValue."</li>\n";
		}
	echo $top3;

	$objCache->save($top3, "top3");
}