Laravel 实现 Facades 功能，laravelfacades_PHP教程

Laravel 实现 Facades 功能，laravelfacades

　　使用过Laravel的同学都知道Facades 的强大，下面就让我们一起创建一个Facades 实例。如有不正确的地方，还请不吝赐教。

　　1. 实现Laravel的自动加载功能

　　首先建立目录app/lib/Myapp，然后添加目录到composer.json中　　

 

<span>1</span> "autoload":<span> {        
</span><span>2</span>     "psr-0":<span>{
</span><span>3</span>         "Myapp":"app/lib"
<span>4</span> <span>    }
</span><span>5</span> }    

　　

　　2. 实现功能类

　　实现能能类 app/lib/Myapp/Test.php　　

<span> 1</span> <?<span>php
</span><span> 2</span> <span>/*</span><span>*
</span><span> 3</span> <span> * @author brudeke
</span><span> 4</span>  <span>*/</span>
<span> 5</span> <span>namespace Myapp;
</span><span> 6</span> <span>class</span><span> Test{
</span><span> 7</span>     <span>public</span> <span>function</span> <span>do</span><span>(){
</span><span> 8</span>         <span>echo</span> 'this is a class'<span>;
</span><span> 9</span> <span>    }
</span><span>10</span> }

　　

　　3. 实现ServiceProvider

　　实现app/lib/Myapp/TestServiceProvider.php ，该类主要是将功能类添加到Ioc容器:　　

<?<span>php
</span><span>/*</span><span>*
 * @author brudeke
 </span><span>*/</span><span>
namespace Myapp;

</span><span>use</span><span> Illuminate\Support\ServiceProvider;

</span><span>class</span> TestServiceProvider <span>extends</span><span> ServiceProvider{

    </span><span>public</span> <span>function</span><span> register()  {
        </span><span>$this</span>->app['test'] = <span>$this</span>->app-><span>share(
            </span><span>function</span> (<span>$app</span><span>) {
                </span><span>return</span> <span>new</span><span> \Myapp\Test();
        });
    }
}</span>

　　4. 实现Facade 实例

　　实现app/lib/Myapp/Facades/TestFacades.php， 该类的主要美化，实现成员函数类似静态方法的调用形式　　

<span> 1</span> <?<span>php
</span><span> 2</span> <span>/*</span><span>*
</span><span> 3</span> <span> * @author brudeke
</span><span> 4</span>  <span>*/</span>
<span> 5</span> <span>namespace Myapp\Facades;
</span><span> 6</span> 
<span> 7</span> <span>use</span><span> Illuminate\Support\Facades\Facade;
</span><span> 8</span> 
<span> 9</span> <span>class</span>  TestFacades <span>extends</span><span> Facade{
</span><span>10</span>     <span>protected</span> <span>static</span> <span>function</span><span> getFacadeAccessor()
</span><span>11</span> <span>    {
</span><span>12</span>         <span>return</span> 'test'<span>;
</span><span>13</span> <span>    }
</span><span>14</span> }

　　

　　5. 加载ServiceProvider

　　在app/config/app.php 中的providers中添加如下配置：　　

<span>1</span> 'providers' => <span>array</span><span>(   
</span><span>2</span> 　　'Myapp\TestServiceProvider'
<span>3</span> ),

　　在app/config/app.php 中的aliases中添加别名：　　

<span>1</span> 'aliases' => <span>array</span><span>(
</span><span>2</span>     'TestClass'            =>  'Myapp\Facades\TestFacades',
<span>3</span> ),

　　接下来就可以在项目中以TestClass::do()的形式使用该功能类了。

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