public static function get_instance($sKey, $sSecret) { if ($sKey && !self::$aInstances[$sKey]) { self::$aInstances[$sKey] = new SimpleDB($sKey, $sSecret); if (!self::$aInstance) { self::$aInstance = self::$aInstances[$sKey]; } } if ($sKey) { return self::$aInstances[$sKey]; } else { return self::$aInstance; } }