static function getBDD()
 {
     if (self::$bdd == null) {
         include_once "params.inc.php";
         try {
             self::$bdd = new PDO("mysql:host={$host};dbname={$dbname};charset=utf8", $user, $password);
         } catch (PDOException $e) {
             print "Erreur !: " . $e->getMessage() . "<br/>";
             die;
         }
     }
     return self::$bdd;
 }
 public function __construct()
 {
     $this->bdd = SingletonBD::getBDD();
 }