版權聲明：本文為博主原創文章，未經博主允許不得轉載。

Lumen的核心類Application引用了專門用于異常處理的RegistersExceptionHandlers，

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

直接來看一下這個引用里的方法RegistersExceptionHandlers.php

<?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.（通過給定的數據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, $headers);}/*** Set the error handling for the application.（設置應用程序的錯誤處理。）** @return void*/protected function registerErrorHandling(){error_reporting(-1);set_error_handler(function ($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 () {$this->handleShutdown();});}/*** Handle the application shutdown routine.（處理關閉應用程序。）** @return void*/protected function handleShutdown(){if (! is_null($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.（如果確定的錯誤類型是致命的。）** @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.（將異常發送給處理程序并返回響應。）** @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.（處理未捕獲的異常情況。）** @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'), $e)->send();}}/*** Get the exception handler from the container.（從容器中獲取異常處理程序。）** @return mixed*/protected function resolveExceptionHandler(){if ($this->bound('Illuminate\Contracts\Debug\ExceptionHandler')) {return $this->make('Illuminate\Contracts\Debug\ExceptionHandler');} else {return $this->make('Laravel\Lumen\Exceptions\Handler');}} }

以上就是封裝用于$app的幾個異常處理方法了，接下來看一下Lumen對異常處理做的默認綁定，這里的單例綁定是接口綁定類的類型

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

app/Exceptions/Handler.php

<?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.（不應該報告的異常類型的列表。）** @var array*/protected $dontReport = [AuthorizationException::class,HttpException::class,ModelNotFoundException::class,ValidationException::class,];/*** Report or log an exception.（報告或記錄異常。）** 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響應中呈現異常。）** @param \Illuminate\Http\Request $request* @param \Exception $e* @return \Illuminate\Http\Response*/public function render($request, Exception $e){return parent::render($request, $e);} }

這個類繼承了一個實現Illuminate\Contracts\Debug\ExceptionHandler::class接口的異常處理基類Laravel\Lumen\Exceptions\Handler，這樣，我們就可以很方便的做異常攔截和處理了！比如，

public function render($request, Exception $e){//數據驗證異常攔截if ($e instanceof \Illuminate\Validation\ValidationException) {var_dump($e->validator->errors()->toArray());}return parent::render($request, $e);}

這樣我們就監聽攔截到了Validation的ValidationException的異常，其實這部分往深扒的話，還有很多東西，如symfony下的debug和http-kernel兩個模塊的包，可以研究下

Lumen技術交流群：310493206

版權聲明：本文為博主原創文章，未經博主允許不得轉載。

轉載于:https://www.cnblogs.com/cxscode/p/7573381.html

總結

以上是生活随笔為你收集整理的Lumen开发：Lumen的异常处理机制的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。