Home Backend Development PHP Tutorial Laravel5(Lumen)创建服务提供者Service Providers

Laravel5(Lumen)创建服务提供者Service Providers

Jun 23, 2016 pm 01:16 PM

在搞新浪SAE的时候,把Lumen装上,需要实现Memcahce和Storage的实现,就用到了Lumen的服务提供者,看了下官方文档和查阅了一些资料,记录一下。(本文在Lumen中实现,Laravel中实现几乎差不多)

1、app\Http\文件夹下面新建Models文件夹,在Models文件夹下面新建Example.php文件,将app\Http\Models加入到composer.json文件中的autoload类自动加载

"autoload": {        "psr-4": {            "App\\": "app/",            "App\\Http\\Models\\": "app/Http/Models/"        }    },
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Example.php文件创建一个example类

<?php/* * example演示类 */namespace App\Http\Models;class Example extends \Illuminate\Database\Eloquent\Model {    public function sayHello() {        echo "hello,this is a model say";    }}
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2、app\Providers\文件夹中创建一个服务提供者ExampleServiceProvider.php。并注册Models中的example类

<?php/** * Example服务提供者 */namespace App\Providers;use Illuminate\Support\ServiceProvider;use App\Http\Models\Example;class ExampleServiceProvider extends ServiceProvider {    /**     * 在容器中注册绑定.     *     * @return void     */    public function register() {        $this->app->singleton('App\Http\Models\Example', function($app) {            return new Example($app);        });    }}
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3、将Example服务提供者加入启动,在bootstrap\app.php中加入

$app->register(App\Providers\ExampleServiceProvider::class);
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完成以上操作我们的Example服务提供者已经添加好了,并启用,下面就来使用它

4、在Controller中使用它

为了测试,我们创建了一个路由为example,controller为ExampleController.php文件

<?php/** * Example实例Controller */namespace App\Http\Controllers;use App\Http\Models\Example;class ExampleController extends Controller {    public function __construct(Example $example) {        $this->example= $example;    }    public function index() {        $this->example->sayHello();    }
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5、浏览器中执行路由,应该看到输出了如下内容:

hello,this is a model say
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小结:

1、Laravel的服务提供者为你添加各种扩展很方便,也是核心东西。感觉就像添加Yii的组件一样,为你扩展各种功能,其实很方便的。Laravel的服务提供者其实是一个很复杂的东西,这里只是一个简单的实例,更多的东西还是要看官方给出的文档及实例。

2、Laravel的扩展开发,也是通过服务提供者启动的,比如:

Cache::extend('mongo', function($app){    return Cache::repository(new MongoStore);});
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以下为中文翻译官方文档原话:

Cache::extend 的调用可以在新的 Laravel 应用程序默认附带的App\Providers\AppServiceProvider 的 boot 方法中完成,或者你可以建立自己的服务提供者来放置这个扩展


参考文档:

1、http://www.golaravel.com/laravel/docs/5.0/providers/

2、https://laravel.com/docs/5.2/providers


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