Laravel 实现 Facades 功能
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 style="color: #008080;">1</span> "autoload":<span style="color: #000000;"> { </span><span style="color: #008080;">2</span> "psr-0":<span style="color: #000000;">{</span><span style="color: #008080;">3</span> "Myapp":"app/lib"<span style="color: #008080;">4</span> <span style="color: #000000;"> }</span><span style="color: #008080;">5</span> }
2. 实现功能类
实现能能类 app/lib/Myapp/Test.php
<span style="color: #008080;"> 1</span> <span style="color: #000000;">php</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">/*</span><span style="color: #008000;">*</span><span style="color: #008080;"> 3</span> <span style="color: #008000;"> * @author brudeke</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">*/</span><span style="color: #008080;"> 5</span> <span style="color: #000000;">namespace Myapp;</span><span style="color: #008080;"> 6</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> Test{</span><span style="color: #008080;"> 7</span> <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> <span style="color: #0000ff;">do</span><span style="color: #000000;">(){</span><span style="color: #008080;"> 8</span> <span style="color: #0000ff;">echo</span> 'this is a class'<span style="color: #000000;">;</span><span style="color: #008080;"> 9</span> <span style="color: #000000;"> }</span><span style="color: #008080;">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 style="color: #000000;">php</span><span style="color: #008000;">/*</span><span style="color: #008000;">* * @author brudeke </span><span style="color: #008000;">*/</span><span style="color: #000000;">namespace Myapp;</span><span style="color: #0000ff;">use</span><span style="color: #000000;"> Illuminate\Support\ServiceProvider;</span><span style="color: #0000ff;">class</span> TestServiceProvider <span style="color: #0000ff;">extends</span><span style="color: #000000;"> ServiceProvider{ </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> register() { </span><span style="color: #800080;">$this</span>->app['test'] = <span style="color: #800080;">$this</span>->app-><span style="color: #000000;">share( </span><span style="color: #0000ff;">function</span> (<span style="color: #800080;">$app</span><span style="color: #000000;">) { </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">new</span><span style="color: #000000;"> \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 style="color: #008080;"> 1</span> <span style="color: #000000;">php</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">/*</span><span style="color: #008000;">*</span><span style="color: #008080;"> 3</span> <span style="color: #008000;"> * @author brudeke</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">*/</span><span style="color: #008080;"> 5</span> <span style="color: #000000;">namespace Myapp\Facades;</span><span style="color: #008080;"> 6</span> <span style="color: #008080;"> 7</span> <span style="color: #0000ff;">use</span><span style="color: #000000;"> Illuminate\Support\Facades\Facade;</span><span style="color: #008080;"> 8</span> <span style="color: #008080;"> 9</span> <span style="color: #0000ff;">class</span> TestFacades <span style="color: #0000ff;">extends</span><span style="color: #000000;"> Facade{</span><span style="color: #008080;">10</span> <span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getFacadeAccessor()</span><span style="color: #008080;">11</span> <span style="color: #000000;"> {</span><span style="color: #008080;">12</span> <span style="color: #0000ff;">return</span> 'test'<span style="color: #000000;">;</span><span style="color: #008080;">13</span> <span style="color: #000000;"> }</span><span style="color: #008080;">14</span> }
5. 加载ServiceProvider
在app/config/app.php 中的providers中添加如下配置：
<span style="color: #008080;">1</span> 'providers' => <span style="color: #0000ff;">array</span><span style="color: #000000;">( </span><span style="color: #008080;">2</span> 'Myapp\TestServiceProvider'<span style="color: #008080;">3</span> ),
在app/config/app.php 中的aliases中添加别名：
<span style="color: #008080;">1</span> 'aliases' => <span style="color: #0000ff;">array</span><span style="color: #000000;">(</span><span style="color: #008080;">2</span> 'TestClass' => 'Myapp\Facades\TestFacades',<span style="color: #008080;">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。
