/** * Gives an instance of dbLayer * @param string $driver * @param string $host * @param string $database * @param string $user * @param string $password * @param boolean $persistent * @return instance du driver */ public static function getInstance($driver, $host, $database, $user = '', $password = '', $persistent = false) { if (!isset(self::$instance)) { self::$instance = self::init($driver, $host, $database, $user, $password, $persistent); } return self::$instance; }