What is Laravel's service container?

 Difficulty: Advanced

The service container is responsible for managing dependencies and resolving classes.

For example:

class OrderService
{
    public function __construct(
        private PaymentGateway $gateway
    ) {}
}

Laravel can determine how to construct OrderService when its dependencies have been registered appropriately.

Bindings can be configured in service providers.

Conceptually:

Interface
    ↓
Container Binding
    ↓
Concrete Implementation
    ↓
Dependency Injection

This becomes extremely valuable in large applications.