Php/laravel/laravel5/DI

IoCとは

Inversion of Control(制御反転)

Laravelで使えるクラス間の依存を管理する管理ツールです。

PHPのDIについてはこちらを参考

php/pimple [ｼｮｰﾄｶｯﾄ]]

Laravelには3種類方法がある

• App::make()
• Constructor Injection
• Method Injection (Laravel5から追加)

App::Make()

-app/Providers/AppServiceProvider.php

namespace App\Providers;
use Illuminate\Support\ServiceProvider;
use App\Services\Service;
class AppServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->bind('Service', function ($app) {
            return new Service();
        });
    }
}

-app/Controller/IocController.php

use App\Http\Controllers\Controller;
use App\Services\Service;
class IocController extends Controller
{
    public function index()
    {
        $service = app('Service');
        echo $service->doSomething();
    }
}

Constructor Injection

Constructで記述すれば勝手にinstanceを生成してくれる

use App\Services\Service;
class IocController extends Controller
{
    public function __construct(Service $service)
    {
        echo $service->doSomething();
    }
}

Method Injection

Methodで記述すれば勝手にinstanceを生成してくれる

use App\Services\Service;
class IocController extends Controller
{
    public function index(Service $service)
    {
        echo $service->doSomething();
    }
}

複数サービスコンテナをApp::make()で追加する場合のサンプル

-App/Provider/AppServiceProvider.php

class AppServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->bind('Service', function ($app) {
            return new Service();
        });
        $this->app->bind('Client', function ($app) {
            return new Client($app->make('Service'));
        });
    }
}

-App/Controller/IocController.php

namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\Services\Client;
class IocController extends Controller
{
    public function index()
    {
        $client = app('Client');
        echo $client->doSomething();
    }
}