本文讲述了Laravel中注册Facades的步骤。分享给大家供大家参考,具体如下:
在Laravel中将类注册为Fcade可以使用Ioc容器,每次使用这个类的时候只会初始化一次类,类似单例模式,而且可以像使用静态方法调用类的方法,下面是在Laravel中注册Facades的步骤。
1.在项目app目录的Providers/AppServiceProvider.php中的register方法新增方法,代码如下。
/** * Register any application services. * * @return void */ public function register() { $this->registerTestModel(); } private function registerTestModel() { $this->app->singleton('testmodel', function ($app) { $model = 'App\Models\Test'; return new $model(); }); $this->app->alias('testmodel', 'App\Models\Test'); }
这里把命名空间是App\Models的Test类注册为单例模式,并且取个别名testmodel.这个Test类的文件位置app/Models/Test.php.
2.建立一个Facade类
在项目根目录app\Facades目录新增文件,如Test.php,代码如下,目录不存在可以新建一个。
<?php namespace App\Facades; use Illuminate\Support\Facades\Facade; class Test extends Facade { /** * Get the registered name of the component. * * @return string */ protected static function getFacadeAccessor() { return 'testmodel'; } }
通过继承Facade,重载getFacadeAccessor方法,返回之前绑定的单例模式的类的别名。
3.使用Facade
经过前面的步骤后,可以使用Test这个Facade了,如下示例是在控制器中使用Facade的方式。
<?php namespace App\Http\Controllers; use App\Facades\Test; use Illuminate\Routing\Controller; class TestController extends Controller { public function __construct() { Test::show(); Test::show(); } }
先看看这个原始类Test.php的内容:
<?php namespace App\Models; use Illuminate\Database\Eloquent\Model; class Test extends Model { protected $table = 'tt'; public static $times = 0; public function __construct() { self::$times++; parent::__construct(); } public function show() { echo self::$times . '<br>'; } }
经过注册Facade后,调用show方法就是Test::show()的形式,并且类似单例模式不会多次实例化,调用也十分简单。
PS:以上仅为注册Facade的方法和步骤,实际项目中可能还需对Model层进行进一步的封装。
转自:小谈博客 http://www.tantengvip.com/2016/01/laravel-facades-register/
更多关于Laravel相关内容感兴趣的读者可查看本站专题:《Laravel框架入门与进阶教程》、《php优秀开发框架总结》、《smarty模板入门基础教程》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家基于Laravel框架的PHP程序设计有所帮助。

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