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下面由laravel教程欄目給大家介紹關于laravel kernel實例化f，希望對需要的朋友有所幫助！

Laravel kernel實例化

$kernel = $app->make(IlluminateContractsHttpKernel::class);

實例化 Kernel

在應用進行實例化時，已經初始化了很多的基礎操作，所以下面的構造方法將會直接使用服務容器的依賴注入來解決類之間的依賴關系。

// IlluminateContractsHttpKernel 類構造器依賴 IlluminateContractsFoundationApplication 和 IlluminateRoutingRouter，將會通過服務容器來處理依賴關系 public function __construct(Application $app, Router $router) {     $this->app = $app;      // 主要委托 $router 來處理     $this->router = $router;     // 以下均為中間件的設置     $router->middlewarePriority = $this->middlewarePriority;      foreach ($this->middlewareGroups as $key => $middleware) {         $router->middlewareGroup($key, $middleware);     }      foreach ($this->routeMiddleware as $key => $middleware) {         $router->aliasMiddleware($key, $middleware);     } }  IlluminateContractsFoundationApplication 的處理： make 時通過別名方式直接調用 $this->instances['app']  IlluminateRoutingRouter 的處理: make 時通過別名方式直接調用 $this->bindings['router'] 數組里面 concrete 對應的匿名函數 Router 依賴 IlluminateContractsEventsDispatcher 和 IlluminateContainerContainer public function __construct(Dispatcher $events, Container $container = null) {     $this->events = $events;     $this->routes = new RouteCollection;     $this->container = $container ?: new Container; }  IlluminateContractsEventsDispatcher 的處理： make 時通過別名方式直接調用 $this->bindings['events'] 數組里面 concrete 對應的匿名函數 Dispatcher 依賴 IlluminateContractsContainerContainer public function __construct(ContainerContract $container = null) {     $this->container = $container ?: new Container; }  IlluminateContainerContainer 的處理: make 時直接調用 $this->instances['IlluminateContainerContainer'] = Object(app) IlluminateContractsContainerContainer 的處理: make 時調用別名直接調用 $this->instances['app'] = Object(app) 上面兩個一樣，沒有區別

注意：以上所列出的依賴關系，都直接委托給服務容器進行自動處理了，不需要怕怕

對 $this->bindings[‘router’] 和 $this->bindings[‘events’] 綁定事件的處理，make 時將會直接調用數組鍵 concrete 對應的匿名函數。

make 時使用到的代碼片段

############################################## if ($concrete instanceof Closure) {                 return $concrete($this, end($this->with));  } ###############################################  $this->bindings['router'] = [         'concrete' => function ($app) {                             return new Router($app['events'], $app);                         },         'shared' => 'true',     ]; $router = new Router($app['events'], $app);  IlluminateRoutingRouter public function __construct(Dispatcher $events, Container $container = null) {     $this->events = $events;     $this->routes = new RouteCollection;     $this->container = $container ?: new Container; }

返回一個 Router 對象，同時會重置 $this->instances[‘router’] = $router 對象，供下次直接調用。

$this->bindings['events'] = [     'concrete' => function ($app) {             return (new Dispatcher($app))->setQueueResolver(function () use ($app) {                 return $app->make(QueueFactoryContract::class);             });             }     'shared' => 'true', ];  $dispatcher = (new IlluminateEventsDispatcher($app))->setQueueResolver(function () use ($app) {                 return $app->make(QueueFactoryContract::class);             });  IlluminateEventsDispatcher: public function __construct(ContainerContract $container = null) {     $this->container = $container ?: new Container; } public function setQueueResolver(callable $resolver) {     $this->queueResolver = $resolver;      return $this; }

返回一個 Dispatcher 對象，同時會重置 $this->instances[‘events’] = $dispatcher 對象，供下次直接調用。

注意： ?
kernel對象是融合了應用和路由的對象，路由又注入了IlluminateEventsDispatcher對象，此為核心對象。