Constructor Injection
The Laravel service container is used to resolve all Laravel controllers. As a result, you are able to type-hint any dependencies your controller may need in its constructor. The dependencies will automatically be resolved and injected into the controller instance:
Of course, you may also type-hint any Laravel contract. If the container can resolve it, you can type-hint it.
Method Injection
In addition to constructor injection, you may also type-hint dependencies on your controller's action methods. For example, let's type-hint the IlluminateHttpRequest instance on one of our methods: