Laravel Service Providers: Bootstrap Your App

php artisan make:provider PaymentServiceProvider

public function register()
{
    $this->app->singleton(PaymentGateway::class, function ($app) {
        return new StripeGateway(config('services.stripe.key'));
    });
}

public function boot()
{
    View::composer('*', function ($view) {
        $view->with('settings', Settings::all());
    });
}

'providers' => [
    App\Providers\PaymentServiceProvider::class,
],