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Facades（读音：/fəˈsäd/ ）为应用程序的 服务容器 中可用的类提供了一个「静态」接口。
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使用 Facade
use Illuminate\Support\Facades\Cache;
Route::get('/cache', function () {
return Cache::get('key');
});
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在开发与 Laravel 进行交互的第三方扩展包时，建议最好选择注入 Laravel 契约，而不是使用 Facades 的方式来使用类。因为扩展包是在 Laravel 本身之外构建，所以你无法使用 Laravel Facades 测试辅助函数。
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许多辅助函数的功能都有与之对应的 Facade。下面这个 Facade 的调用和辅助函数的作用是一样的：
return View::make('profile');
return view('profile');
- Facade 类参考
| Facade | 类 | 服务容器绑定 |
|---|---|---|
| App | Illuminate\Foundation\Application | app |
| Artisan | Illuminate\Contracts\Console\Kernel | artisan |
| Auth | Illuminate\Auth\AuthManager | auth |
| Blade | Illuminate\View\Compilers\BladeCompiler | blade.compiler |
| Bus | Illuminate\Contracts\Bus\Dispatcher | ` |
| Cache | Illuminate\Cache\Repository | cache |
| Config | Illuminate\Config\Repository | config |
| Cookie | Illuminate\Cookie\CookieJar | cookie |
| Crypt | Illuminate\Encryption\Encrypter | encrypter |
| DB | Illuminate\Database\DatabaseManager | db |
| DB (Instance) | Illuminate\Database\Connection | |
| Event | Illuminate\Events\Dispatcher | events |
| File | Illuminate\Filesystem\Filesystem | files |
| Gate | Illuminate\Contracts\Auth\Access\Gate | |
| Hash | Illuminate\Contracts\Hashing\Hasher | hash |
| Lang | Illuminate\Translation\Translator | translator |
| Log | Illuminate\Log\Writer | log |
| Mail Illuminate\Mail\Mailer | mailer | |
| Notification | Illuminate\Notifications\ChannelManager | |
| Password | Illuminate\Auth\Passwords\PasswordBrokerManager | auth.password |
| Queue | Illuminate\Queue\QueueManager | queue |
| Queue (Instance) | Illuminate\Contracts\Queue\Queue | queue |
| Queue (Base Class) | Illuminate\Queue\Queue | |
| Redirect | Illuminate\Routing\Redirector | redirect |
| Redis | Illuminate\Redis\Database | redis |
| Request | Illuminate\Http\Request | request |
| Response | Illuminate\Contracts\Routing\ResponseFactory | |
| Route | Illuminate\Routing\Router | router |
| Schema | Illuminate\Database\Schema\Blueprint | |
| Session | Illuminate\Session\SessionManager | session |
| Session (Instance) | Illuminate\Session\Store | |
| Storage | Illuminate\Contracts\Filesystem\Factory filesystem | |
| URL | Illuminate\Routing\UrlGenerator | url |
| Validator | Illuminate\Validation\Factory | validator |
| Validator (Instance) | Illuminate\Validation\Validator | |
| View | Illuminate\View\Factory | view |
| View (Instance) | Illuminate\View\View |
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