class Application extends Container
{use Concerns\RoutesRequests,Concerns\RegistersExceptionHandlers;

<?phpnamespace Laravel\Lumen\Concerns;use Error;
use ErrorException;
use Symfony\Component\Console\Output\ConsoleOutput;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Component\Debug\Exception\FatalErrorException;
use Symfony\Component\Debug\Exception\FatalThrowableError;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;trait RegistersExceptionHandlers
{/*** Throw an HttpException with the given data.（通过给定的数据HttpException。）** @param  int     $code* @param  string  $message* @param  array   $headers* @return void** @throws \Symfony\Component\HttpKernel\Exception\HttpException*/public function abort($code, $message = '', array $headers = []){if ($code == 404) {throw new NotFoundHttpException($message);}throw new HttpException($code, $message, null, $headers);}/*** Set the error handling for the application.（设置应用程序的错误处理。）** @return void*/protected function registerErrorHandling(){error_reporting(-1);set_error_handler(function ($level, $message, $file = '', $line = 0) {if (error_reporting() & $level) {throw new ErrorException($message, 0, $level, $file, $line);}});set_exception_handler(function ($e) {$this->handleUncaughtException($e);});register_shutdown_function(function () {$this->handleShutdown();});}/*** Handle the application shutdown routine.（处理关闭应用程序。）** @return void*/protected function handleShutdown(){if (! is_null($error = error_get_last()) && $this->isFatalError($error['type'])) {$this->handleUncaughtException(new FatalErrorException($error['message'], $error['type'], 0, $error['file'], $error['line']));}}/*** Determine if the error type is fatal.（如果确定的错误类型是致命的。）** @param  int  $type* @return bool*/protected function isFatalError($type){$errorCodes = [E_ERROR, E_CORE_ERROR, E_COMPILE_ERROR, E_PARSE];if (defined('FATAL_ERROR')) {$errorCodes[] = FATAL_ERROR;}return in_array($type, $errorCodes);}/*** Send the exception to the handler and return the response.（将异常发送给处理程序并返回响应。）** @param  \Throwable  $e* @return Response*/protected function sendExceptionToHandler($e){$handler = $this->resolveExceptionHandler();if ($e instanceof Error) {$e = new FatalThrowableError($e);}$handler->report($e);return $handler->render($this->make('request'), $e);}/*** Handle an uncaught exception instance.（处理未捕获的异常情况。）** @param  \Throwable  $e* @return void*/protected function handleUncaughtException($e){$handler = $this->resolveExceptionHandler();if ($e instanceof Error) {$e = new FatalThrowableError($e);}$handler->report($e);if ($this->runningInConsole()) {$handler->renderForConsole(new ConsoleOutput, $e);} else {$handler->render($this->make('request'), $e)->send();}}/*** Get the exception handler from the container.（从容器中获取异常处理程序。）** @return mixed*/protected function resolveExceptionHandler(){if ($this->bound('Illuminate\Contracts\Debug\ExceptionHandler')) {return $this->make('Illuminate\Contracts\Debug\ExceptionHandler');} else {return $this->make('Laravel\Lumen\Exceptions\Handler');}}
}

$app->singleton(Illuminate\Contracts\Debug\ExceptionHandler::class,App\Exceptions\Handler::class
);

<?phpnamespace App\Exceptions;use Exception;
use Illuminate\Validation\ValidationException;
use Illuminate\Auth\Access\AuthorizationException;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Laravel\Lumen\Exceptions\Handler as ExceptionHandler;
use Symfony\Component\HttpKernel\Exception\HttpException;class Handler extends ExceptionHandler
{/*** A list of the exception types that should not be reported.（不应该报告的异常类型的列表。）** @var array*/protected $dontReport = [AuthorizationException::class,HttpException::class,ModelNotFoundException::class,ValidationException::class,];/*** Report or log an exception.（报告或记录异常。）** This is a great spot to send exceptions to Sentry, Bugsnag, etc.** @param  \Exception  $e* @return void*/public function report(Exception $e){parent::report($e);}/*** Render an exception into an HTTP response.（在HTTP响应中呈现异常。）** @param  \Illuminate\Http\Request  $request* @param  \Exception  $e* @return \Illuminate\Http\Response*/public function render($request, Exception $e){return parent::render($request, $e);}
}

public function render($request, Exception $e){//数据验证异常拦截if ($e instanceof \Illuminate\Validation\ValidationException) {var_dump($e->validator->errors()->toArray());}return parent::render($request, $e);}