authController.php

<?php namespace Acme;

class AuthController{

    protected $registration;

    public function __construct(RegisterUser $registration){

        $this->registration = $registration;

    }

    public function register(){

        $this->registration->execute([],$this);

    }

    public function userRegisteredSuccessfully(){

        var_dump('Created Successfully. Redirect Somewhere');

    }

    public function userRegisteredFailed(){

        var_dump('Created Failed. Redirect Back');

    }


}

ex.php

<?php

$registration = new Acme\RegisterUser;
$authController = new Acme\AuthController($registration);

$authController->register();

RegisterUser.php

<?php namespace Acme;

class RegisterUser{

    public function execute(array $data, $listener){

        var_dump('Registering the user.');

        $listener->userRegisteredSuccessfully();

    }

}