public function vars($var) {
        if (is_array($var)) {
            foreach ($var as $key => $valeur) {
                $this->_var[$key] = $valeur;
            }
        }
        else if (func_num_args() == 2) {
            $args = func_get_args();
            $this->_var[$args[0]] = $args[1];
        }

        else if (func_num_args() == 3) {
            $args = func_get_args();
            $this->_var[$args[0]] = [$args[1], $args[2]];
        }
    }