$kernel?=?$app->make(Illuminate\Contracts\Http\Kernel::class);

#實(shí)例化Kernel

在應(yīng)用實(shí)例化時(shí)，已經(jīng)初始化了很多的基礎(chǔ)操作，所以下面的建構(gòu)方法將會(huì)直接使用服務(wù)容器的依賴注入來(lái)解決類別之間的依賴關(guān)係。

//?\Illuminate\Contracts\Http\Kernel?類構(gòu)造器依賴?\Illuminate\Contracts\Foundation\Application?和?\Illuminate\Routing\Router，將會(huì)通過(guò)服務(wù)容器來(lái)處理依賴關(guān)系
public?function?__construct(Application?$app,?Router?$router)
{
????$this->app?=?$app;

????//?主要委托?$router?來(lái)處理
????$this->router?=?$router;
????//?以下均為中間件的設(shè)置
????$router->middlewarePriority?=?$this->middlewarePriority;

????foreach?($this->middlewareGroups?as?$key?=>?$middleware)?{
????????$router->middlewareGroup($key,?$middleware);
????}

????foreach?($this->routeMiddleware?as?$key?=>?$middleware)?{
????????$router->aliasMiddleware($key,?$middleware);
????}
}

\Illuminate\Contracts\Foundation\Application?的處理：
make?時(shí)通過(guò)別名方式直接調(diào)用?$this->instances['app']

\Illuminate\Routing\Router?的處理:
make?時(shí)通過(guò)別名方式直接調(diào)用?$this->bindings['router']?數(shù)組里面?concrete?對(duì)應(yīng)的匿名函數(shù)
Router?依賴?\Illuminate\Contracts\Events\Dispatcher?和?\Illuminate\Container\Container
public?function?__construct(Dispatcher?$events,?Container?$container?=?null)
{
????$this->events?=?$events;
????$this->routes?=?new?RouteCollection;
????$this->container?=?$container??:?new?Container;
}

\Illuminate\Contracts\Events\Dispatcher?的處理：
make?時(shí)通過(guò)別名方式直接調(diào)用?$this->bindings['events']?數(shù)組里面?concrete?對(duì)應(yīng)的匿名函數(shù)
Dispatcher?依賴?\Illuminate\Contracts\Container\Container
public?function?__construct(ContainerContract?$container?=?null)
{
????$this->container?=?$container??:?new?Container;
}

\Illuminate\Container\Container?的處理:
make?時(shí)直接調(diào)用?$this->instances['Illuminate\Container\Container']?=?Object(app)
\Illuminate\Contracts\Container\Container?的處理:
make?時(shí)調(diào)用別名直接調(diào)用?$this->instances['app']?=?Object(app)
上面兩個(gè)一樣，沒(méi)有區(qū)別

注意：以上所列出的依賴關(guān)係，都直接委託給服務(wù)容器進(jìn)行自動(dòng)處理了，不需要害怕

對(duì)$this-> bindings['router'] 和$this->bindings['events'] 綁定事件的處理，make 時(shí)將會(huì)直接呼叫數(shù)組鍵concrete 對(duì)應(yīng)的匿名函數(shù)。

make 時(shí)使用到的程式碼片段

##############################################
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);

\Illuminate\Routing\Router
public?function?__construct(Dispatcher?$events,?Container?$container?=?null)
{
????$this->events?=?$events;
????$this->routes?=?new?RouteCollection;
????$this->container?=?$container??:?new?Container;
}

返回一個(gè)Router 對(duì)象，同時(shí)會(huì)重設(shè)$this->instances['router'] = $router 對(duì)象，讓下次直接調(diào)用。

$this->bindings['events']?=?[
????'concrete'?=>?function?($app)?{
????????????return?(new?Dispatcher($app))->setQueueResolver(function?()?use?($app)?{
????????????????return?$app->make(QueueFactoryContract::class);
????????????});
????????????}
????'shared'?=>?'true',
];

$dispatcher?=?(new?\Illuminate\Events\Dispatcher($app))->setQueueResolver(function?()?use?($app)?{
????????????????return?$app->make(QueueFactoryContract::class);
????????????});

Illuminate\Events\Dispatcher:
public?function?__construct(ContainerContract?$container?=?null)
{
????$this->container?=?$container??:?new?Container;
}
public?function?setQueueResolver(callable?$resolver)
{
????$this->queueResolver?=?$resolver;

????return?$this;
}

傳回一個(gè) Dispatcher 對(duì)象，同時(shí)會(huì)重置 $this->instances['events'] = $dispatcher 對(duì)象，以便下次直接呼叫。

注意： ?
kernel物件是融合了應(yīng)用和路由的對(duì)象，路由又注入了IlluminateEventsDispatcher對(duì)象，此為核心對(duì)象。