private function handleCustomerOperations($request) { //include_once data handling class include_once __DIR__ . '/../dataController/CustomerController.php'; //create a new customer object which carries out the further operations $customerController = new CustomerController(); //set data and header if (isset($request[1])) { $this->setResponseCodesAndData($customerController->getById($request[1]), 1); } else { $this->setResponseCodesAndData($customerController->getAll(), 1); } }