How to get Facebook share count for url

I used this script to grab google plus and facebook shares:

<?
class share {
private $url,$timeout;
function __construct($url,$timeout=10) {
$this->url=rawurlencode($url);
$this->timeout=$timeout;
}
function get_fb() {
$json_string = $this->file_get_contents_curl('http://api.facebook.com/restserver.php?method=links.getStats&format=json&urls='.$url);
$json = json_decode($json_string, true);
return isset($json[0]['share_count'])?intval($json[0]['share_count']):0;
}
function get_gp()  {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "https://clients6.google.com/rpc");
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_POSTFIELDS, '[{"method":"pos.plusones.get","id":"p","params":{"nolog":true,"id":"'.rawurldecode($this->url).'","source":"widget","userId":"@viewer","groupId":"@self"},"jsonrpc":"2.0","key":"p","apiVersion":"v1"}]');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
$curl_results = curl_exec ($curl);
curl_close ($curl);
$json = json_decode($curl_results, true);
return isset($json[0]['result']['metadata']['globalCounts']['count'])?intval( $json[0]['result']['metadata']['globalCounts']['count'] ):0;
}
private function file_get_contents_curl($url){
$ch=curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);
$cont = curl_exec($ch);
if(curl_error($ch))
{
die(curl_error($ch));
}
return $cont;
}
}
?>

PHP:

In header.php i had this:

<? echo $obj->get_fb(); ?>

PHP:

to display facebook share count for my page/url but now I get this error from facebook: (
REST API is deprecated for versions v2.1 and higher) is there any way to get facebook share count from: http://graph.facebook.com/?id=http://www.mysite.com ?