Laravel 核心概念

╰半夏微凉° 2023-10-06 16:13 39阅读 0赞

## 简介 ##

**核心概念**  
简介、服务容器、服务提供者、facade、contract、生命周期。

我叫 Laravel。我是一个装了药的 药箱，专门处理人们的问题、治病。

人们喜欢把我的药箱叫做 `service container` 服务容器。

把我的药箱里面的一块一块的小格子叫 `service provider` 服务提供者。在这些小格子里可以放置不同的药。

有的人用到我的时候，会在我的小格子或者是他们自制的格子里面放置自己制作的药。有些药有副作用，比如可以治疗肚子疼又能治疗头痛，这样肚子疼、头不疼的患者吃了可能对头产生不良影响。所以我定了一份合同契约让放进来的药有个规范。并且我内置的药也是有契约来规范约束我自己。他们把我的这个合同称为 `contract` 契约。

有些药片很难看，可以把它用糖衣包装起来，这样小孩子更容易吞食使用。我里面很多药都用了这种包装，药效没增加，但是更容易使用。人们后期添加的药也可以自制包装。这种包装称之为 `facade` 门面。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaWd1YW5nMTAy_size_16_color_FFFFFF_t_70]

## 一、药箱（服务容器） ##

绑定，解析，解析事件（类似于在药瓶中放药，取药，取药事项）。

放药（绑定）

基础绑定

$this->app->bind('HelpSpot\API', function ($app) {
        
        return new HelpSpot\API($app->make('HttpClient'));
    });

绑定单例

$this->app->singleton('HelpSpot\API', function ($app) {
        
        return new HelpSpot\API($app->make('HttpClient'));
    });

绑定实例

$api = new HelpSpot\API(new HttpClient);
    
    $this->app->instance('HelpSpot\API', $api);

绑定实例时给定初始化数据

$this->app->when('App\Http\Controllers\UserController')
              ->needs('$variableName')
              ->give($value);    // 利用上下文给绑定设置初始数据

### 举个栗子 ###

interface Fruit
    {
        
        public function color();
    }
    
    class Apple implements Fruit
    {
        
        public $color;
    
        public function __construct($color){
        
            $this->color = $color;
        }
    
        public function color(){
        
            return $this->color;
        }
    }
    
    app()->bind('Fruit', 'Apple');
    app()->when('Apple')->needs('$color')->give('red');
    echo app('Fruit')->color();

绑定接口到实例

$this->app->bind(
        'App\Contracts\EventPusher',
        'App\Services\RedisEventPusher'
    );

根据上下文提供不同的绑定

$this->app->when(PhotoController::class)
              ->needs(Filesystem::class)
              ->give(function () {
        
                  return Storage::disk('local');
              });
    
    $this->app->when([VideoController::class, UploadController::class])
              ->needs(Filesystem::class)
              ->give(function () {
        
                  return Storage::disk('s3');
              });

给绑定设置标签

$this->app->bind('SpeedReport', function () {
        
        //
    });
    
    $this->app->bind('MemoryReport', function () {
        
        //
    });
    
    $this->app->tag(['SpeedReport', 'MemoryReport'], 'reports');
    
    $this->app->bind('ReportAggregator', function ($app) {
        
        return new ReportAggregator($app->tagged('reports'));
    });

当 Service 已经被解析，extend 方法可以用来修改解析出来的实例 $service：

$this->app->extend(Service::class, function ($service, $app) {
        
        return new DecoratedService($service);
    });

### 拿药（解析） ###

$this->app->make('HelpSpot\API');
    app()->make('HelpSpot\API');
    resolve('HelpSpot\API');
    app('HelpSpot\API');
    app()['HelpSpot\API']
    app()->get('HelpSpot\API')
    public function xxx(HelpSpot\API $users)

// 注入依赖
    $api = $this->app->makeWith('HelpSpot\API', ['id' => 1]);
    $api = app('HelpSpot\API', ['id' => 1]); 
    $api = resolve('HelpSpot\API', ['id' => 1]);

# laravel 实现了 PSR-11 接口，所以就可以用该接口的类型提示解析
    use Psr\Container\ContainerInterface;
    Route::get('/', function (ContainerInterface $container) {
        
        $service = $container->get('Service');
        //
    });

### 容器事件 ###

容器解析任何对象时调用

$this->app->resolving(function ($object, $app) {
        
    
    });

容器解析 HelpSpot\\API 时调用

$this->app->resolving(HelpSpot\API::class, function ($api, $app) {
        
    
    });

## 二、药箱里的小格子（服务提供者） ##

### 制作一个服务提供者 ###

1、`php artisan make:provider RiakServiceProvider`

2、服务提供者主要由两个方法：`register` 和 `boot`。`register`只负责绑定一些东西到容器（放药）。`boot`可以使用类型提示解析等来完成任意你想做的事情，这些都归功于容器调用所有服务提供者的`register`方法之后才去调用`boot`方法。

3、在`config/app.php`的`providers`数组中注册服务提供者。

### 制作一个延迟服务提供者 ###

如果只是绑定服务到服务容器，可以设置为延迟（实现 DeferrableProvider 接口），在项目真正需要用到之前不会注册。

class RiakServiceProvider extends ServiceProvider implements DeferrableProvider
    {
        
        public function register()
        {
        
            $this->app->singleton(Connection::class, function ($app) {
        
                return new Connection(config('riak'));
            });
        }
    
        public function provides()
        {
        
            return [Connection::class];
        }
    }

## 三、Facades ##

*  不要在一个类中，用太多的facades。过于臃肿的情况下应该将大类分解成几个小类。

优点

方便测试（辅助函数和 facades 没什么区别，测试方法也是一样的）。

Route::get('/cache', function () {
        
        return Cache::get('key');     // === return cache('key');
    });

public function testBasicExample()
    {
        
        Cache::shouldReceive('get')
             ->with('key')
             ->andReturn('value');
    
        $this->visit('/cache')
             ->see('value');
    }

### 实时的 facades ###

原生用法 vs 实时用法

# 原生用法 class Podcast
    use App\Contracts\Publisher;
    public function publish(Publisher $publisher)
    {
        
        $this->update(['publishing' => now()]);
        $publisher->publish($this);
    }

# 实时用法
    use Facades\App\Contracts\Publisher;
    
    Publisher::publish($this);

测试实时的 facades

use Facades\App\Contracts\Publisher;
    Publisher::shouldReceive('publish')->once()->with($podcast);

### facades 列表 ###

<table> 
 <thead> 
  <tr> 
   <th>Facade</th> 
   <th>Class</th> 
   <th>Service Container Binding</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>App</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Foundation/Application.html" rel="nofollow">Illuminate\Foundation\Application</a></td> 
   <td><code>app</code></td> 
  </tr> 
  <tr> 
   <td>Artisan</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Console/Kernel.html" rel="nofollow">Illuminate\Contracts\Console\Kernel</a></td> 
   <td><code>artisan</code></td> 
  </tr> 
  <tr> 
   <td>Auth</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Auth/AuthManager.html" rel="nofollow">Illuminate\Auth\AuthManager</a></td> 
   <td><code>auth</code></td> 
  </tr> 
  <tr> 
   <td>Auth (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Auth/Guard.html" rel="nofollow">Illuminate\Contracts\Auth\Guard</a></td> 
   <td><code>auth.driver</code></td> 
  </tr> 
  <tr> 
   <td>Blade</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/View/Compilers/BladeCompiler.html" rel="nofollow">Illuminate\View\Compilers\BladeCompiler</a></td> 
   <td><code>blade.compiler</code></td> 
  </tr> 
  <tr> 
   <td>Broadcast</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Broadcasting/Factory.html" rel="nofollow">Illuminate\Contracts\Broadcasting\Factory</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Broadcast (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Broadcasting/Broadcaster.html" rel="nofollow">Illuminate\Contracts\Broadcasting\Broadcaster</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Bus</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Bus/Dispatcher.html" rel="nofollow">Illuminate\Contracts\Bus\Dispatcher</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Cache</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Cache/CacheManager.html" rel="nofollow">Illuminate\Cache\CacheManager</a></td> 
   <td><code>cache</code></td> 
  </tr> 
  <tr> 
   <td>Cache (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Cache/Repository.html" rel="nofollow">Illuminate\Cache\Repository</a></td> 
   <td><code>cache.store</code></td> 
  </tr> 
  <tr> 
   <td>Config</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Config/Repository.html" rel="nofollow">Illuminate\Config\Repository</a></td> 
   <td><code>config</code></td> 
  </tr> 
  <tr> 
   <td>Cookie</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Cookie/CookieJar.html" rel="nofollow">Illuminate\Cookie\CookieJar</a></td> 
   <td><code>cookie</code></td> 
  </tr> 
  <tr> 
   <td>Crypt</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Encryption/Encrypter.html" rel="nofollow">Illuminate\Encryption\Encrypter</a></td> 
   <td><code>encrypter</code></td> 
  </tr> 
  <tr> 
   <td>DB</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Database/DatabaseManager.html" rel="nofollow">Illuminate\Database\DatabaseManager</a></td> 
   <td><code>db</code></td> 
  </tr> 
  <tr> 
   <td>DB (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Database/Connection.html" rel="nofollow">Illuminate\Database\Connection</a></td> 
   <td><code>db.connection</code></td> 
  </tr> 
  <tr> 
   <td>Event</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Events/Dispatcher.html" rel="nofollow">Illuminate\Events\Dispatcher</a></td> 
   <td><code>events</code></td> 
  </tr> 
  <tr> 
   <td>File</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Filesystem/Filesystem.html" rel="nofollow">Illuminate\Filesystem\Filesystem</a></td> 
   <td><code>files</code></td> 
  </tr> 
  <tr> 
   <td>Gate</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Auth/Access/Gate.html" rel="nofollow">Illuminate\Contracts\Auth\Access\Gate</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Hash</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Hashing/Hasher.html" rel="nofollow">Illuminate\Contracts\Hashing\Hasher</a></td> 
   <td><code>hash</code></td> 
  </tr> 
  <tr> 
   <td>Lang</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Translation/Translator.html" rel="nofollow">Illuminate\Translation\Translator</a></td> 
   <td><code>translator</code></td> 
  </tr> 
  <tr> 
   <td>Log</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Log/LogManager.html" rel="nofollow">Illuminate\Log\LogManager</a></td> 
   <td><code>log</code></td> 
  </tr> 
  <tr> 
   <td>Mail</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Mail/Mailer.html" rel="nofollow">Illuminate\Mail\Mailer</a></td> 
   <td><code>mailer</code></td> 
  </tr> 
  <tr> 
   <td>Notification</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Notifications/ChannelManager.html" rel="nofollow">Illuminate\Notifications\ChannelManager</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Password</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Auth/Passwords/PasswordBrokerManager.html" rel="nofollow">Illuminate\Auth\Passwords\PasswordBrokerManager</a></td> 
   <td><code>auth.password</code></td> 
  </tr> 
  <tr> 
   <td>Password (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Auth/Passwords/PasswordBroker.html" rel="nofollow">Illuminate\Auth\Passwords\PasswordBroker</a></td> 
   <td><code>auth.password.broker</code></td> 
  </tr> 
  <tr> 
   <td>Queue</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Queue/QueueManager.html" rel="nofollow">Illuminate\Queue\QueueManager</a></td> 
   <td><code>queue</code></td> 
  </tr> 
  <tr> 
   <td>Queue (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Queue/Queue.html" rel="nofollow">Illuminate\Contracts\Queue\Queue</a></td> 
   <td><code>queue.connection</code></td> 
  </tr> 
  <tr> 
   <td>Queue (Base Class)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Queue/Queue.html" rel="nofollow">Illuminate\Queue\Queue</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Redirect</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Routing/Redirector.html" rel="nofollow">Illuminate\Routing\Redirector</a></td> 
   <td><code>redirect</code></td> 
  </tr> 
  <tr> 
   <td>Redis</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Redis/RedisManager.html" rel="nofollow">Illuminate\Redis\RedisManager</a></td> 
   <td><code>redis</code></td> 
  </tr> 
  <tr> 
   <td>Redis (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Redis/Connections/Connection.html" rel="nofollow">Illuminate\Redis\Connections\Connection</a></td> 
   <td><code>redis.connection</code></td> 
  </tr> 
  <tr> 
   <td>Request</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Http/Request.html" rel="nofollow">Illuminate\Http\Request</a></td> 
   <td><code>request</code></td> 
  </tr> 
  <tr> 
   <td>Response</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Routing/ResponseFactory.html" rel="nofollow">Illuminate\Contracts\Routing\ResponseFactory</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Response (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Http/Response.html" rel="nofollow">Illuminate\Http\Response</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Route</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Routing/Router.html" rel="nofollow">Illuminate\Routing\Router</a></td> 
   <td><code>router</code></td> 
  </tr> 
  <tr> 
   <td>Schema</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Database/Schema/Builder.html" rel="nofollow">Illuminate\Database\Schema\Builder</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>Session</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Session/SessionManager.html" rel="nofollow">Illuminate\Session\SessionManager</a></td> 
   <td><code>session</code></td> 
  </tr> 
  <tr> 
   <td>Session (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Session/Store.html" rel="nofollow">Illuminate\Session\Store</a></td> 
   <td><code>session.store</code></td> 
  </tr> 
  <tr> 
   <td>Storage</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Filesystem/FilesystemManager.html" rel="nofollow">Illuminate\Filesystem\FilesystemManager</a></td> 
   <td><code>filesystem</code></td> 
  </tr> 
  <tr> 
   <td>Storage (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Contracts/Filesystem/Filesystem.html" rel="nofollow">Illuminate\Contracts\Filesystem\Filesystem</a></td> 
   <td><code>filesystem.disk</code></td> 
  </tr> 
  <tr> 
   <td>URL</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Routing/UrlGenerator.html" rel="nofollow">Illuminate\Routing\UrlGenerator</a></td> 
   <td><code>url</code></td> 
  </tr> 
  <tr> 
   <td>Validator</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Validation/Factory.html" rel="nofollow">Illuminate\Validation\Factory</a></td> 
   <td><code>validator</code></td> 
  </tr> 
  <tr> 
   <td>Validator (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/Validation/Validator.html" rel="nofollow">Illuminate\Validation\Validator</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>View</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/View/Factory.html" rel="nofollow">Illuminate\View\Factory</a></td> 
   <td><code>view</code></td> 
  </tr> 
  <tr> 
   <td>View (Instance)</td> 
   <td><a href="https://laravel.com/api/%7b%7bversion%7d%7d/Illuminate/View/View.html" rel="nofollow">Illuminate\View\View</a></td> 
   <td></td> 
  </tr> 
 </tbody> 
</table>

## 四、Contracts ##

Facades 和 Contracts 没有什么值得注意的区别，但是当你开发第三方包的时候，最好使用 Contracts，这样有利于你编写测试，否则如果使用 Facades，因为是第三方包，将不能访问 facade 测试函数。

使用方法

在构造函数中类型提示注入就行了。

### Contracts 列表 ###

<table> 
 <thead> 
  <tr> 
   <th>Contract</th> 
   <th>References Facade</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/Access/Authorizable.php" rel="nofollow">Illuminate\Contracts\Auth\Access\Authorizable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/Access/Gate.php" rel="nofollow">Illuminate\Contracts\Auth\Access\Gate</a></td> 
   <td><code>Gate</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/Authenticatable.php" rel="nofollow">Illuminate\Contracts\Auth\Authenticatable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/CanResetPassword.php" rel="nofollow">Illuminate\Contracts\Auth\CanResetPassword</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/Factory.php" rel="nofollow">Illuminate\Contracts\Auth\Factory</a></td> 
   <td><code>Auth</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/Guard.php" rel="nofollow">Illuminate\Contracts\Auth\Guard</a></td> 
   <td><code>Auth::guard()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/PasswordBroker.php" rel="nofollow">Illuminate\Contracts\Auth\PasswordBroker</a></td> 
   <td><code>Password::broker()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/PasswordBrokerFactory.php" rel="nofollow">Illuminate\Contracts\Auth\PasswordBrokerFactory</a></td> 
   <td><code>Password</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/StatefulGuard.php" rel="nofollow">Illuminate\Contracts\Auth\StatefulGuard</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/SupportsBasicAuth.php" rel="nofollow">Illuminate\Contracts\Auth\SupportsBasicAuth</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Auth/UserProvider.php" rel="nofollow">Illuminate\Contracts\Auth\UserProvider</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Bus/Dispatcher.php" rel="nofollow">Illuminate\Contracts\Bus\Dispatcher</a></td> 
   <td><code>Bus</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Bus/QueueingDispatcher.php" rel="nofollow">Illuminate\Contracts\Bus\QueueingDispatcher</a></td> 
   <td><code>Bus::dispatchToQueue()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Broadcasting/Factory.php" rel="nofollow">Illuminate\Contracts\Broadcasting\Factory</a></td> 
   <td><code>Broadcast</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Broadcasting/Broadcaster.php" rel="nofollow">Illuminate\Contracts\Broadcasting\Broadcaster</a></td> 
   <td><code>Broadcast::connection()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Broadcasting/ShouldBroadcast.php" rel="nofollow">Illuminate\Contracts\Broadcasting\ShouldBroadcast</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Broadcasting/ShouldBroadcastNow.php" rel="nofollow">Illuminate\Contracts\Broadcasting\ShouldBroadcastNow</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cache/Factory.php" rel="nofollow">Illuminate\Contracts\Cache\Factory</a></td> 
   <td><code>Cache</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cache/Lock.php" rel="nofollow">Illuminate\Contracts\Cache\Lock</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cache/LockProvider.php" rel="nofollow">Illuminate\Contracts\Cache\LockProvider</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cache/Repository.php" rel="nofollow">Illuminate\Contracts\Cache\Repository</a></td> 
   <td><code>Cache::driver()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cache/Store.php" rel="nofollow">Illuminate\Contracts\Cache\Store</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Config/Repository.php" rel="nofollow">Illuminate\Contracts\Config\Repository</a></td> 
   <td><code>Config</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Console/Application.php" rel="nofollow">Illuminate\Contracts\Console\Application</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Console/Kernel.php" rel="nofollow">Illuminate\Contracts\Console\Kernel</a></td> 
   <td><code>Artisan</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Container/Container.php" rel="nofollow">Illuminate\Contracts\Container\Container</a></td> 
   <td><code>App</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cookie/Factory.php" rel="nofollow">Illuminate\Contracts\Cookie\Factory</a></td> 
   <td><code>Cookie</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Cookie/QueueingFactory.php" rel="nofollow">Illuminate\Contracts\Cookie\QueueingFactory</a></td> 
   <td><code>Cookie::queue()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Database/ModelIdentifier.php" rel="nofollow">Illuminate\Contracts\Database\ModelIdentifier</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Debug/ExceptionHandler.php" rel="nofollow">Illuminate\Contracts\Debug\ExceptionHandler</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Encryption/Encrypter.php" rel="nofollow">Illuminate\Contracts\Encryption\Encrypter</a></td> 
   <td><code>Crypt</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Events/Dispatcher.php" rel="nofollow">Illuminate\Contracts\Events\Dispatcher</a></td> 
   <td><code>Event</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Filesystem/Cloud.php" rel="nofollow">Illuminate\Contracts\Filesystem\Cloud</a></td> 
   <td><code>Storage::cloud()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Filesystem/Factory.php" rel="nofollow">Illuminate\Contracts\Filesystem\Factory</a></td> 
   <td><code>Storage</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Filesystem/Filesystem.php" rel="nofollow">Illuminate\Contracts\Filesystem\Filesystem</a></td> 
   <td><code>Storage::disk()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Foundation/Application.php" rel="nofollow">Illuminate\Contracts\Foundation\Application</a></td> 
   <td><code>App</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Hashing/Hasher.php" rel="nofollow">Illuminate\Contracts\Hashing\Hasher</a></td> 
   <td><code>Hash</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Http/Kernel.php" rel="nofollow">Illuminate\Contracts\Http\Kernel</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Mail/MailQueue.php" rel="nofollow">Illuminate\Contracts\Mail\MailQueue</a></td> 
   <td><code>Mail::queue()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Mail/Mailable.php" rel="nofollow">Illuminate\Contracts\Mail\Mailable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Mail/Mailer.php" rel="nofollow">Illuminate\Contracts\Mail\Mailer</a></td> 
   <td><code>Mail</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Notifications/Dispatcher.php" rel="nofollow">Illuminate\Contracts\Notifications\Dispatcher</a></td> 
   <td><code>Notification</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Notifications/Factory.php" rel="nofollow">Illuminate\Contracts\Notifications\Factory</a></td> 
   <td><code>Notification</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Pagination/LengthAwarePaginator.php" rel="nofollow">Illuminate\Contracts\Pagination\LengthAwarePaginator</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Pagination/Paginator.php" rel="nofollow">Illuminate\Contracts\Pagination\Paginator</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Pipeline/Hub.php" rel="nofollow">Illuminate\Contracts\Pipeline\Hub</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Pipeline/Pipeline.php" rel="nofollow">Illuminate\Contracts\Pipeline\Pipeline</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/EntityResolver.php" rel="nofollow">Illuminate\Contracts\Queue\EntityResolver</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/Factory.php" rel="nofollow">Illuminate\Contracts\Queue\Factory</a></td> 
   <td><code>Queue</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/Job.php" rel="nofollow">Illuminate\Contracts\Queue\Job</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/Monitor.php" rel="nofollow">Illuminate\Contracts\Queue\Monitor</a></td> 
   <td><code>Queue</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/Queue.php" rel="nofollow">Illuminate\Contracts\Queue\Queue</a></td> 
   <td><code>Queue::connection()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/QueueableCollection.php" rel="nofollow">Illuminate\Contracts\Queue\QueueableCollection</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/QueueableEntity.php" rel="nofollow">Illuminate\Contracts\Queue\QueueableEntity</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Queue/ShouldQueue.php" rel="nofollow">Illuminate\Contracts\Queue\ShouldQueue</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Redis/Factory.php" rel="nofollow">Illuminate\Contracts\Redis\Factory</a></td> 
   <td><code>Redis</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Routing/BindingRegistrar.php" rel="nofollow">Illuminate\Contracts\Routing\BindingRegistrar</a></td> 
   <td><code>Route</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Routing/Registrar.php" rel="nofollow">Illuminate\Contracts\Routing\Registrar</a></td> 
   <td><code>Route</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Routing/ResponseFactory.php" rel="nofollow">Illuminate\Contracts\Routing\ResponseFactory</a></td> 
   <td><code>Response</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Routing/UrlGenerator.php" rel="nofollow">Illuminate\Contracts\Routing\UrlGenerator</a></td> 
   <td><code>URL</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Routing/UrlRoutable.php" rel="nofollow">Illuminate\Contracts\Routing\UrlRoutable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Session/Session.php" rel="nofollow">Illuminate\Contracts\Session\Session</a></td> 
   <td><code>Session::driver()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/Arrayable.php" rel="nofollow">Illuminate\Contracts\Support\Arrayable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/Htmlable.php" rel="nofollow">Illuminate\Contracts\Support\Htmlable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/Jsonable.php" rel="nofollow">Illuminate\Contracts\Support\Jsonable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/MessageBag.php" rel="nofollow">Illuminate\Contracts\Support\MessageBag</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/MessageProvider.php" rel="nofollow">Illuminate\Contracts\Support\MessageProvider</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/Renderable.php" rel="nofollow">Illuminate\Contracts\Support\Renderable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Support/Responsable.php" rel="nofollow">Illuminate\Contracts\Support\Responsable</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Translation/Loader.php" rel="nofollow">Illuminate\Contracts\Translation\Loader</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Translation/Translator.php" rel="nofollow">Illuminate\Contracts\Translation\Translator</a></td> 
   <td><code>Lang</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Validation/Factory.php" rel="nofollow">Illuminate\Contracts\Validation\Factory</a></td> 
   <td><code>Validator</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Validation/ImplicitRule.php" rel="nofollow">Illuminate\Contracts\Validation\ImplicitRule</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Validation/Rule.php" rel="nofollow">Illuminate\Contracts\Validation\Rule</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Validation/ValidatesWhenResolved.php" rel="nofollow">Illuminate\Contracts\Validation\ValidatesWhenResolved</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/Validation/Validator.php" rel="nofollow">Illuminate\Contracts\Validation\Validator</a></td> 
   <td><code>Validator::make()</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/View/Engine.php" rel="nofollow">Illuminate\Contracts\View\Engine</a></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/View/Factory.php" rel="nofollow">Illuminate\Contracts\View\Factory</a></td> 
   <td><code>View</code></td> 
  </tr> 
  <tr> 
   <td><a href="https://github.com/illuminate/contracts/blob/%7b%7bversion%7d%7d/View/View.php" rel="nofollow">Illuminate\Contracts\View\View</a></td> 
   <td><code>View::make()</code></td> 
  </tr> 
 </tbody> 
</table>

## 五、请求生命周期 ##

本节主要概括了框架运行的生命周期。

1 所有请求必定首先通过 `public/index.php`。

2 在上述这个文件中首先加载 `composer` 自动加载文件，然后从 `bootstrap/app.php` 实例化一个服务容器。

3 接下来，框架会根据请求类型传送请求至 `app/Http/Kernel.php` 或者 `app/Console/Kernel.php`。

4 `app/Http/Kernel.php` 扩展了`Illuminate\Foundation\Http\Kernel`类，父类强制在处理请求前应该做哪些操作，操作内容都放到了 `bootstrappers`数组里面（配置错误处理、配置记录日志、检测应用环境、注册和启动服务提供者等）。子类在数组 `middleware`中规定了请求在被处理前必须经过的一些处理（读写 session、判断是否处于维护模式、验证 csrf 令牌等）。

5 处理请求，返回响应内容。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaWd1YW5nMTAy_size_16_color_FFFFFF_t_70 1]  
所有请求的入口文件index.php:

<?php
    //注册composer自动加载器
    require __DIR__.'/../bootstrap/autoload.php';
    
    //引导程序启动框架，创建服务容器实例
    $app = require_once __DIR__.'/../bootstrap/app.php';
    
    //创建kernel处理请求。
    $kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
    
    $response = $kernel->handle(
        $request = Illuminate\Http\Request::capture()
    );
    
    //返回结果
    $response->send();
    
    $kernel->terminate($request, $response);

## 六、laravel 框架核心组成 ##

简单了解laravel框架的组成，让我们更好的利用它。暂时不理解也没关系，以后注意去验证，探索就是。

laravel 结构核心组成：

服务容器（service container）
     服务提供者（service provider）
         门面（facades）
         契约（contract）

### 流程 ###

1 所有请求的起点都是从入口文件index.php开始。  
2 加载composer类加载器 注册composer类加载器，实现文件自动加载。  
3 创建服务容器  
4 创建 http Kernel核心程序 所有的请求都是它来处理。  
5 路由 route 路由分发到相应的控制器  
6 控制器 contrainer 控制逻辑及显示页面  
7 显示页面 view

#### 初始化服务容器 ####

*  设置项目基本路径
 *  容器绑定一些基本实例  
    app，Container，PackageManifest等。
 *  注册基本服务提供者  
    事件服务提供者，日志服务提供者，路由服务提供者。

初始化完容器之后。会向容器绑定三个重要的实例：  
http/kernel和console/kernel，以及异常处理ExceptionHandler

#### http kernels ####

创建kernel,初始化，调用handle()方法处理请求。  
http kernels：位于app/Http/Kernel.php，继承Illuminate\\Foundation\\Http\\Kernel class，这个类定义了一些列bootstrappers 。

#### bootstrapper ####

bootstrappers包括配置，检测应用环境等，这类任务需要在请求处理前进行处理。  
bootstraping 操作最重要的一件事是加载service providers。

启动引导程序，按顺序启动：

*  LoadEnvironmentVariables::class,  
    //加载环境变量
 *  LoadConfiguration::class,  
    //加载配置文件，方便后面引用。
 *  HandleExceptions::class,
 *  RegisterFacades::class,
 *  RegisterProviders::class,
 *  BootProviders::class,

中间件middleware  
这个类还定义了很多中间件，所有的请求都要经过的中间件，例如：http session, csrf token等。

#### service provider ####

所有的服务提供在在config/app.php文件里providers数组。  
首先，所有的服务提供者调用register()方法。当所有的服务提供者都注册了，那么boot方法启动。  
service providers是启动laravel 应用的关键。创建应用实例，service providers注册，请求递交到启动的应用。  
应用的service providers默认是app/providers目录下。  
AppServiceProvider 是添加启动和服务容器绑定的最佳位置。

### 服务容器 Service Container ###

Laravel 服务容器是一个用于管理类依赖和执行依赖注入的强大工具。  
依赖注入的本质是：通过构造器或者“setter”方法，将依赖的类注入到类中。  
service container 就是装满服务的容器，我们通过注册(register)服务将服务放到容器里面。在类里面，我们注入依赖的类（要调用的类），然后调用。  
可以简单的理解服务容器其实就是一个全局的数组（或者说类），我们把类的信息放在这个数组里，然后根据需要从这里获取。

### 服务提供者 Service Provider ###

服务提供者是laravel 应用的启动核心。laravel 的核心服务都是通过服务提供者启动。  
但是，我们所谓的“启动”指的是什么？  
通常，这意味着注册服务，包括注册服务容器绑定、事件监听器、中间件甚至路由。服务提供者是应用配置的中心。服务提供者是应用配置的中心(配置了应用主要的服务)。  
config/app.php的provides数组定义了项目要加载的服务。

### 别名静态调用 Facade 门面 ###

laravel facades 为应用服务容器中的绑定类提供了一个“静态”接口。  
laravel facades 作为服务容器的底层类的‘静态代理。相对于传统静态方法，facades更加简洁和灵活。

用静态方法的形式来调用方法，使用更简单。但其本质还是创建一个实例，调用实例的方法。  
基于php的动态方法调用（dynamic methods）。

facades实际被service container解析和管理。

#### facades vs helper ####

helper方法和facades方法没有本质区别。helper functions的实质是调用底层的类facades方法。

**缺点**

facades 最大的危险是将类的范围蔓延了。类有可能被撑的很大。所以保持类的精简。  
当构建一个第三方包与laravel交互时，最好不用使用facades,而是使用contracts。

#### facade工作 ####

laravel facades是一个类提供方法从容器获取对象。  
所有的facades都继承了”Illuminate\\Support\\Facades\\Facade“类。  
Facade 基类使用\_\_callStatic 魔术方法来延迟调用你的facade从容器解析的对象。  
facade的任何调用都将通过laravel的service实例。  
facade 基类定义了getFacadeAccessor()方法，这个方法返回绑定的服务容器名字。  
当调用facade方法时候，laravel 从service container解析getFacadeAccessor方法中的对象，并运行该对象方法。

#### facade默认的服务容器注册 ####

文件路径：laravel\\framework\\src\\Illuminate\\Foundation\\Application.php  
在该文件构造方法中调用registerCoreContainerAliases()方法，来注册服务容器的别名。  
例如: ”URL“ facade-》对应“url”服务容器-》 实际类对应“ \\Illuminate\\Routing\\UrlGenerator”

#### Facade实际引用的实际类对照 ####

<table> 
 <thead> 
  <tr> 
   <th>Facade</th> 
   <th>Class Service</th> 
   <th>Container Binding</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>App</td> 
   <td>Illuminate\Foundation\Application</td> 
   <td>app</td> 
  </tr> 
  <tr> 
   <td>Artisan</td> 
   <td>Illuminate\Contracts\Console\Kernel</td> 
   <td>artisan</td> 
  </tr> 
  <tr> 
   <td>Auth</td> 
   <td>Illuminate\Auth\AuthManager</td> 
   <td>auth</td> 
  </tr> 
  <tr> 
   <td>Auth (Instance)</td> 
   <td>Illuminate\Contracts\Auth\Guard</td> 
   <td>auth.driver</td> 
  </tr> 
  <tr> 
   <td>Blade</td> 
   <td>Illuminate\View\Compilers\BladeCompiler</td> 
   <td>blade.compiler</td> 
  </tr> 
  <tr> 
   <td>Broadcast</td> 
   <td>Illuminate\Contracts\Broadcasting\Factory &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Broadcast (Instance)</td> 
   <td>Illuminate\Contracts\Broadcasting\Broadcaster &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Bus</td> 
   <td>Illuminate\Contracts\Bus\Dispatcher &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Cache</td> 
   <td>Illuminate\Cache\CacheManager</td> 
   <td>cache</td> 
  </tr> 
  <tr> 
   <td>Cache (Instance)</td> 
   <td>Illuminate\Cache\Repository</td> 
   <td>cache.store</td> 
  </tr> 
  <tr> 
   <td>Config</td> 
   <td>Illuminate\Config\Repository</td> 
   <td>config</td> 
  </tr> 
  <tr> 
   <td>Cookie</td> 
   <td>Illuminate\Cookie\CookieJar</td> 
   <td>cookie</td> 
  </tr> 
  <tr> 
   <td>Crypt</td> 
   <td>Illuminate\Encryption\Encrypter</td> 
   <td>encrypter</td> 
  </tr> 
  <tr> 
   <td>DB</td> 
   <td>Illuminate\Database\DatabaseManager</td> 
   <td>db</td> 
  </tr> 
  <tr> 
   <td>DB (Instance)</td> 
   <td>Illuminate\Database\Connection</td> 
   <td>db.connection</td> 
  </tr> 
  <tr> 
   <td>Event</td> 
   <td>Illuminate\Events\Dispatcher</td> 
   <td>events</td> 
  </tr> 
  <tr> 
   <td>File</td> 
   <td>Illuminate\Filesystem\Filesystem</td> 
   <td>files</td> 
  </tr> 
  <tr> 
   <td>Gate</td> 
   <td>Illuminate\Contracts\Auth\Access\Gate &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Hash</td> 
   <td>Illuminate\Contracts\Hashing\Hasher</td> 
   <td>hash</td> 
  </tr> 
  <tr> 
   <td>Lang</td> 
   <td>Illuminate\Translation\Translator</td> 
   <td>translator</td> 
  </tr> 
  <tr> 
   <td>Log</td> 
   <td>Illuminate\Log\LogManager</td> 
   <td>log</td> 
  </tr> 
  <tr> 
   <td>Mail</td> 
   <td>Illuminate\Mail\Mailer</td> 
   <td>mailer</td> 
  </tr> 
  <tr> 
   <td>Notification</td> 
   <td>Illuminate\Notifications\ChannelManager &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Password</td> 
   <td>Illuminate\Auth\Passwords\PasswordBrokerManager</td> 
   <td>auth.password</td> 
  </tr> 
  <tr> 
   <td>Password (Instance)</td> 
   <td>Illuminate\Auth\Passwords\PasswordBroker</td> 
   <td>auth.password.broker</td> 
  </tr> 
  <tr> 
   <td>Queue</td> 
   <td>Illuminate\Queue\QueueManager</td> 
   <td>queue</td> 
  </tr> 
  <tr> 
   <td>Queue (Instance)</td> 
   <td>Illuminate\Contracts\Queue\Queue</td> 
   <td>queue.connection</td> 
  </tr> 
  <tr> 
   <td>Queue (Base Class)</td> 
   <td>Illuminate\Queue\Queue &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Redirect</td> 
   <td>Illuminate\Routing\Redirector</td> 
   <td>redirect</td> 
  </tr> 
  <tr> 
   <td>Redis</td> 
   <td>Illuminate\Redis\RedisManager</td> 
   <td>redis</td> 
  </tr> 
  <tr> 
   <td>Redis (Instance)</td> 
   <td>Illuminate\Redis\Connections\Connection</td> 
   <td>redis.connection</td> 
  </tr> 
  <tr> 
   <td>Request</td> 
   <td>Illuminate\Http\Request</td> 
   <td>request</td> 
  </tr> 
  <tr> 
   <td>Response</td> 
   <td>Illuminate\Contracts\Routing\ResponseFactory &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Response (Instance)</td> 
   <td>Illuminate\Http\Response &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Route</td> 
   <td>Illuminate\Routing\Router</td> 
   <td>router</td> 
  </tr> 
  <tr> 
   <td>Schema</td> 
   <td>Illuminate\Database\Schema\Builder &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>Session</td> 
   <td>Illuminate\Session\SessionManager</td> 
   <td>session</td> 
  </tr> 
  <tr> 
   <td>Session (Instance)</td> 
   <td>Illuminate\Session\Store</td> 
   <td>session.store</td> 
  </tr> 
  <tr> 
   <td>Storage</td> 
   <td>Illuminate\Filesystem\FilesystemManager</td> 
   <td>filesystem</td> 
  </tr> 
  <tr> 
   <td>Storage (Instance)</td> 
   <td>Illuminate\Contracts\Filesystem\Filesystem</td> 
   <td>filesystem.disk</td> 
  </tr> 
  <tr> 
   <td>URL</td> 
   <td>Illuminate\Routing\UrlGenerator</td> 
   <td>url</td> 
  </tr> 
  <tr> 
   <td>Validator</td> 
   <td>Illuminate\Validation\Factory</td> 
   <td>validator</td> 
  </tr> 
  <tr> 
   <td>Validator (Instance)</td> 
   <td>Illuminate\Validation\Validator &nbsp;</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>View</td> 
   <td>Illuminate\View\Factory</td> 
   <td>view</td> 
  </tr> 
  <tr> 
   <td>View (Instance)</td> 
   <td>Illuminate\View\View &nbsp;</td> 
  </tr> 
 </tbody> 
</table>

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