Multiple Custom 404

Hello,
I'm creating a feature for my website that requires to send a custom error page, while keeping the default one for the rest of the website.
The controller haves to send different error code (404, 501...) and its corresponding page using a code similar to this :

Code:

throw new ImageException(404, "error Message")

or just like this if it's not possible (separate exception for different error code) :

Code:

throw new ImageNotFound("error message");

It is possible to achieve such thing ?

(I tried this, but it doesn't work : )
Image.php :

PHP Code:

// ...
 public function index()
 {
  throw new ImageException(""); 
}
// ... 


ImageException.php :

PHP Code:

<?php

namespace App\Controllers\Img;

use CodeIgniter\Exceptions\ExceptionInterface;
use RuntimeException;

class ImageException extends RuntimeException implements ExceptionInterface
{
 protected $log = false;
 protected $code = 404;

 public static function forPageNotFound(string $message = null)
 {
   return view("img/404");
   //return new static($message ?? lang('HTTP.pageNotFound'));
 }
} 


Actually learning CodeIgniter4 and creating a complex CMS system for fan-translations teams (Kagescan)
@LoganTann on GitHub // French // He-Him