Trouver les partages sur les reseaux sociaux

<?php
/**
 * Rechercher les partages d'une URL sur les reseaux sociaux
 *
 * @author Fobec 11/2012
 * @copyright http://www.fobec.com/php5/1118/trouver-partages-sur-reseaux-sociaux.html
 */
 
class SocialShareChecker {
    //URL des API
    const API_FB='http://api.facebook.com/restserver.php?method=links.getStats&urls=';
    const API_TW='http://urls.api.twitter.com/1/urls/count.json?url=';
    const API_GP="https://clients6.google.com/rpc";
    //propriétés publique Facebook
    public $fb_share=0;
    public $fb_like=0;
    public $fb_comment=0;
    //propriétés publique twitter
    public $tw_tweet=0;
    //propriétés publique Google  
    public $gp_count=0;
 
    /**
     * Requetes sur les API des réseaux sociaux
     * @param string $url
     */
    public function query($url) {
        $this->parse_fb($url);
        $this->parse_tw($url);
        $this->parse_gp($url);
    }
 
    /**
     * Extraire les partages FaceBook
     * @param string $url
     */
    private function parse_fb($url) {
        $url = self::API_FB.urlencode($url);
        $xml_buf = file_get_contents($url);
        $xml = simplexml_load_string($xml_buf);
 
        if ($xml) {
            $this->fb_share=intval($xml->link_stat->share_count);
            $this->fb_like=intval($xml->link_stat->like_count);
            $this->fb_comment=intval($xml->link_stat->comment_count);
        }
    }
 
    /**
     * Extraire les partages Twitter
     * @param string $url
     */
    private function parse_tw($url) {
        $url = self::API_TW.urlencode($url);
        $json_string = file_get_contents($url);
 
        $json = json_decode($json_string, true);
        $this->tw_tweet= intval( $json['count'] );
    }
 
    /**
     * Extraire les partages Google  
     * @param string $url
     */
    private function parse_gp($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, self::API_GP);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, '[{"method":"pos.plusones.get","id":"p",
        "params":{"nolog":true,"id":"' . $url . '","source":"widget","userId":"@viewer",
        "groupId":"@self"},"jsonrpc":"2.0","key":"p","apiVersion":"v1"}]');
        curl_setopt($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);
 
        $this->gp_count= intval( $json[0]['result']['metadata']['globalCounts']['count'] );
    }
}
?>

<?php
//URL à tester
$url = "http://www.fobec.com/apps/localiser-ip/";
 
$checker=new SocialShareChecker();
$checker->query($url);
 
echo 'URL: '.$url;
echo '<br>'.$checker->fb_share.' Partages FaceBook';
echo '<br>'.$checker->tw_tweet.' Tweets';
echo '<br>'.$checker->gp_count.' Google Plus';
?>