How to inject service as argument in symfony?

@ryleigh 

In Symfony, you can inject a service as an argument by simply type-hinting the service's class in the constructor or method that requires the service.

For example, if you have a service called my_custom_service that you want to inject into a controller, you would modify the controller's constructor to include a parameter for the service:

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use AppServiceMyCustomService;

class MyController extends AbstractController
{
    private $myCustomService;

    public function __construct(MyCustomService $myCustomService)
    {
        $this->myCustomService = $myCustomService;
    }

    // ...
}

Then in your services.yaml file, you would configure the service to be injected into the controller:

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services:
    AppControllerMyController:
        arguments:
            $myCustomService: '@AppServiceMyCustomService'

Now, whenever you instantiate MyController, Symfony will automatically inject an instance of MyCustomService into the controller's constructor.