How to use a function or a method from another controller in Laravel

SO, while working on a personal project, I was stuck on how to call a function from another controller — I know this is a bad practice in terms of code organization.

Note:

If you have a method in one controller that you need to access in another controller, then that’s a sign you need to re-factor. Consider re-factoring the method out in to a service class, that you can then instantiate in multiple controllers.

I will not recommend using this method on an organization’s project.

Okay, let’s continue…

So, I have two controllers namedParentController and ChildController. In ChildController I have a method called respondValidationError.

And I needed to access this method in ParentController, I did this:

Child Controller

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Response;
use Illuminate\Http\Response as Res;
use Illuminate\Pagination\LengthAwarePaginator as Paginator;
class ChildController extends Controller
{
public function respondValidationError($message, $errors){
    return $this->respond([
          'status' => 'error',