static function passinggreen_master_db() { if (DatabaseFactory::$passinggreen_master_db_instance == null) { $write = DatabaseFactory::get_db_settings("com/passinggreen/cfg_write"); $read = DatabaseFactory::get_db_settings("com/passinggreen/cfg_master_read"); DatabaseFactory::$passinggreen_master_db_instance = new Database($read, $write); } return DatabaseFactory::$passinggreen_master_db_instance; }