整体加载流程
- index.php
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117<?php
/**
* Laravel - A PHP Framework For Web Artisans
*
* @package Laravel
* @author Taylor Otwell <taylor@laravel.com>
*/
/*
|--------------------------------------------------------------------------
| Register The Auto Loader
|--------------------------------------------------------------------------
|
| Composer provides a convenient, automatically generated class loader for
| our application. We just need to utilize it! We'll simply require it
| into the script here so that we don't have to worry about manual
| loading any of our classes later on. It feels great to relax.
|
*/
require __DIR__.'/../bootstrap/autoload.php'; //引入composer自动加载
/*
|--------------------------------------------------------------------------
| Turn On The Lights
|--------------------------------------------------------------------------
|
| We need to illuminate PHP development, so let us turn on the lights.
| This bootstraps the framework and gets it ready for use, then it
| will load up this application so that we can run it and send
| the responses back to the browser and delight our users.
|
*/
$app = require_once __DIR__.'/../bootstrap/app.php'; //整个应用的实例化,及初始化
1.
public function __construct($basePath = null)
{
if ($basePath) {
$this->setBasePath($basePath); //设置各个模块的路径
}
$this->registerBaseBindings(); //将基础的容器绑定到app上
$this->registerBaseServiceProviders(); //初始化三个基本的服务
$this->register(new EventServiceProvider($this)); //事件,里面初始化了一个队列
$this->register(new LogServiceProvider($this)); //日志
$this->register(new RoutingServiceProvider($this)); //路由
$this->registerCoreContainerAliases(); //注册一些框架的核心组件的别名到app上
}
2.
实例化web 的核心
$app->singleton(
Illuminate\Contracts\Http\Kernel::class,
App\Http\Kernel::class
);
实例化cli的核心,所以artisn 命令能够执行
$app->singleton(
Illuminate\Contracts\Console\Kernel::class,
App\Console\Kernel::class
);
实例化全局异常处理
$app->singleton(
Illuminate\Contracts\Debug\ExceptionHandler::class,
App\Exceptions\Handler::class
);
/*
|--------------------------------------------------------------------------
| Run The Application
|--------------------------------------------------------------------------
|
| Once we have the application, we can handle the incoming request
| through the kernel, and send the associated response back to
| the client's browser allowing them to enjoy the creative
| and wonderful application we have prepared for them.
|
*/
$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
$response = $kernel->handle(
$request = Illuminate\Http\Request::capture() //通过$_GET $SERVER $_POST 构造Request
);
··· handle 核心方法
protected function sendRequestThroughRouter($request)
{
$this->app->instance('request', $request);
Facade::clearResolvedInstance('request');
$this->bootstrap();
return (new Pipeline($this->app))
->send($request)
->through($this->app->shouldSkipMiddleware() ? [] : $this->middleware)
->then($this->dispatchToRouter());
...
public function then(Closure $destination)
{
$pipeline = array_reduce(
array_reverse($this->pipes) //中间件是倒叙执行的, $this->carry(), $this- >prepareDestination($destination)
);
return $pipeline($this->passable);
}
}
···
$response->send(); //response 发送数据 pipeline
$kernel->terminate($request, $response); //调用一些回调中间件