$this->app->bind('HelpSpot\API', function ($app) {
 return new HelpSpot\API($app->make('HttpClient'));
});

$this->app->singleton('HelpSpot\API', function ($app) {
 return new HelpSpot\API($app->make('HttpClient'));
});

$this->app->when('App\Http\Controllers\UserController')
 ->needs('$variableName')
 ->give($value);

$this->app->bind(
 'App\Contracts\EventPusher', 
 'App\Services\RedisEventPusher'
);

use App\Contracts\EventPusher;

/**
 * 创建一个新的类实例
 *
 * @param EventPusher $pusher
 * @return void
 */
public function __construct(EventPusher $pusher){
 $this->pusher = $pusher;
}

use Illuminate\Support\Facades\Storage;
use App\Http\Controllers\VideoController;
use App\Http\Controllers\PhotoControllers;
use Illuminate\Contracts\Filesystem\Filesystem;

$this->app->when(PhotoController::class)
 ->needs(Filesystem::class)
 ->give(function () {
 return Storage::disk('local');
 });

$this->app->when(VideoController::class)
 ->needs(Filesystem::class)
 ->give(function () {
 return Storage::disk('s3');
 });

$this->app->bind('SpeedReport', function () {
 //
});

$this->app->bind('MemoryReport', function () {
 //
});

$this->app->tag(['SpeedReport', 'MemoryReport'], 'reports');

$this->app->bind('ReportAggregator', function ($app) {
 return new ReportAggregator($app->tagged('reports'));
});

$this->app->extend(Service::class, function($service) {
 return new DecoratedService($service);
});