Laravel框架的运行过程

深入理解Laravel框架启动流程

最新推荐文章于 2025-09-28 17:11:46 发布

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最新推荐文章于 2025-09-28 17:11:46 发布 · 1k 阅读

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#laravel #php

本文详细介绍了Laravel框架的启动过程，从入口文件public/index.php开始，讲解了如何加载Composer自动加载器，创建Application实例，以及kernel类在处理HTTP请求时的角色。通过分析kernel的handle方法和sendRequestThroughRouter方法，揭示了框架如何通过中间件分发请求到路由。此外，还探讨了bootstrap方法中的启动步骤，包括调用服务容器的bootstrapWith方法，以及启动过程中涉及的类和功能，如加载环境变量、配置文件、异常处理、门面类注册和服务提供者等。

Laravel框架的入口文件public/index.php

<?php

/**
 * Laravel - A PHP Framework For Web Artisans
 *
 * @package  Laravel
 * @author   Taylor Otwell <taylor@laravel.com>
 */

define('LARAVEL_START', microtime(true));

/*
|--------------------------------------------------------------------------
| 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__.'/../vendor/autoload.php';

/*
|--------------------------------------------------------------------------
| 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';

/*
|--------------------------------------------------------------------------
| 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()
);

$response->send();

$kernel->terminate($request, $response);

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