__handlePropertyHandler(__CLASS__); } #[Inject] protected ValidatorFactoryInterface $validationFactory; public function index(RequestInterface $request) { $validator = $this->validationFactory->make($request->all(), ['foo' => 'required', 'bar' => 'required'], ['foo.required' => 'foo必填', 'bar.required' => 'bar必填']); if ($validator->fails()) { // Handle exception $errorMessage = $validator->errors()->first(); var_dump($errorMessage); } } }