Service Container adalah fitur inti Laravel yang mengelola dependency injection secara otomatis.

Tanpa DI (hardcoded dependency):

class OrderController {
    public function store() {
        $payment = new StripePayment(); // Hardcoded!
        $payment->charge(100000);
    }
}

Dengan DI (injected):

class OrderController {
    public function store(PaymentGateway $payment) {
        $payment->charge(100000);
        // Laravel otomatis inject implementasi yang benar!
    }
}

Binding di Service Provider:

// AppServiceProvider.php
public function register(): void
{
    $this->app->bind(PaymentGateway::class, StripePayment::class);
}

Sekarang bisa swap implementasi:

// Development
$this->app->bind(PaymentGateway::class, FakePayment::class);

// Production
$this->app->bind(PaymentGateway::class, StripePayment::class);

Keuntungan:

• Kode tidak tergantung pada implementasi spesifik
• Mudah testing (inject mock/fake)
• Swap implementasi tanpa ubah controller