get webpage thumbnails from Google

<?php
//ini_set('display_errors',1);
//error_reporting(E_ALL | E_WARNING);

function is_valid_url($url){
	$url = filter_var($url, FILTER_SANITIZE_URL);
	return filter_var($url, FILTER_VALIDATE_URL);
}

/* RUNTIME */
$sites = is_valid_url($_GET['url']);

if($sites){
	$sites = preg_split('/\r\n|\r|\n/', $sites);
	foreach($sites as $site)
	{
		//cache it
/*
		if ( !$image = apc_fetch( "thumbnail:".$site ) )
		{
*/
			$image = file_get_contents("https://www.googleapis.com/pagespeedonline/v1/runPagespeed?url=$site&screenshot=true");
			$image = json_decode($image, true);

			//echo "<pre>"; print_r($image); die;

			$image = $image['screenshot']['data'];
			//apc_add("thumbnail:".$site, $image, 2400);
// 		}


		$image = str_replace(array('_','-'),array('/','+'),$image);

		echo "<img src=\"data:image/jpeg;base64,".$image."\" border='1' />";


	}

}
else{
	echo "Please provide a url.";
}
?>