laravel启动顺序

laraval 启动：

fpm下

laravel默认读取的uri是$_SERVER[‘REQUEST_URI’];
所以你可以在任何页面构建一个请求test

$uri = '/test';$_SERVER['REQUEST_URI'] = $uri . '?' . $_SERVER['QUERY_STRING'];require __DIR__ . '/public/index.php';

运行请求

$app = require_once __DIR__.'/../bootstrap/app.php';$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);$response = $kernel->handle(    $request = Illuminate\Http\Request::capture());$response->send();$kernel->terminate($request, $response);

bootstrap/app.php

//http请求内核$app->singleton(    Illuminate\Contracts\Http\Kernel::class,    App\Http\Kernel::class);$app->singleton(    Illuminate\Contracts\Console\Kernel::class,    App\Console\Kernel::class);//错误控制$app->singleton(    Illuminate\Contracts\Debug\ExceptionHandler::class,    App\Exceptions\Handler::class);//这里你可以注册自己的中间件/** * 分配中间件到路由 */$app->routeMiddleware([    'sign' => App\Http\Middleware\SignMiddleware::class,]);//加载路由$app->group(['namespace' => 'App\Http\Controllers'], function ($app) {    require __DIR__ . '/../app/Http/routes.php';});//配置加载配置$app->configure('cache');

运行完bootstrap/app
开始运行fpm的内核
Illuminate\Foundation\Http\Kernel

class Kernel implements KernelContract{    protected $bootstrappers = [        //检查环境变量，.env的配置会在这个时候加载        'Illuminate\Foundation\Bootstrap\DetectEnvironment',        //加载config/*下的文件，放到config中        'Illuminate\Foundation\Bootstrap\LoadConfiguration',        //注册log类默认采用mongo，没有配置则会定位到logs/laravel.log        'Illuminate\Foundation\Bootstrap\ConfigureLogging',        'Illuminate\Foundation\Bootstrap\HandleExceptions',        //注测config/app.php中alias中所有配置的别名        'Illuminate\Foundation\Bootstrap\RegisterFacades',        //注册providers，并且运行每个register方法        'Illuminate\Foundation\Bootstrap\RegisterProviders',        //运行每个provider的boot方法        'Illuminate\Foundation\Bootstrap\BootProviders',    ];    /**     * Create a new HTTP kernel instance.     *     * @param  \Illuminate\Contracts\Foundation\Application  $app     * @param  \Illuminate\Routing\Router  $router     * @return void     */    public function __construct(Application $app, Router $router)    {        $this->app = $app;        $this->router = $router;        //构建的时候配置好路由中间件，定位到单个路由的时候会查询运行        foreach ($this->routeMiddleware as $key => $middleware) {            $router->middleware($key, $middleware);        }    }    /**     * Handle an incoming HTTP request.     *     * @param  \Illuminate\Http\Request  $request     * @return \Illuminate\Http\Response     */    public function handle($request)    {        try {            $request->enableHttpMethodParameterOverride();            //运行请求，如果没有运行到这里一定进入了errorhander，错误控制类中            $response = $this->sendRequestThroughRouter($request);        } catch (Exception $e) {            $this->reportException($e);            $response = $this->renderException($request, $e);        } catch (Throwable $e) {            $e = new FatalThrowableError($e);            $this->reportException($e);            $response = $this->renderException($request, $e);        }        $this->app['events']->fire('kernel.handled', [$request, $response]);        return $response;    }/**     * Send the given request through the middleware / router.     *     * @param  \Illuminate\Http\Request  $request     * @return \Illuminate\Http\Response     */    protected function sendRequestThroughRouter($request)    {        $this->app->instance('request', $request);        Facade::clearResolvedInstance('request');        $this->bootstrap();        //进入管道，运行全局空间件然后，运行路由中间件，最后运行路由对应的controller        return (new Pipeline($this->app))                    ->send($request)                    ->through($this->app->shouldSkipMiddleware() ? [] : $this->middleware)                    ->then($this->dispatchToRouter());    }进入laravel\framework\src\Illuminate\Pipeline\Pipeline.php/**     * Run the pipeline with a final destination callback.     *     * @param  \Closure  $destination     * @return mixed     */    public function then(Closure $destination)    {        $firstSlice = $this->getInitialSlice($destination);        $pipes = array_reverse($this->pipes);        //这里建立了一个函数栈，循环递归调用函数，最后运行$firstSlice函数        //第一个中间件运行的时候有两个参数，第一个是request请求结果，第二个是下一个中间件的函数        //也就是中间件handle方法中的$next        return call_user_func(            array_reduce($pipes, $this->getSlice(), $firstSlice), $this->passable        );    }     /**     * Get a Closure that represents a slice of the application onion.     *     * @return \Closure     */    protected function getSlice()    {        return function ($stack, $pipe) {            return function ($passable) use ($stack, $pipe) {                // If the pipe is an instance of a Closure, we will just call it directly but                // otherwise we'll resolve the pipes out of the container and call it with                // the appropriate method and arguments, returning the results back out.                if ($pipe instanceof Closure) {                    return call_user_func($pipe, $passable, $stack);                } else {                    list($name, $parameters) = $this->parsePipeString($pipe);                    return call_user_func_array([$this->container->make($name), $this->method],                                                array_merge([$passable, $stack], $parameters));                }            };        };    }