Use namespaces in Codeigniter 3.1.6

Hi, I want to use my own classes but it throws me an type error.

Type: TypeError

Message: Argument 1 passed to Posts::__construct() must be an instance of PostsRepository, none given, called in C:\wamp64\www\ciblog\system\core\CodeIgniter.php on line 518


Here is my code:

Posts.php

PHP Code:

class Posts extends CI_controller
{
    
    public function __construct (\application\repositories\posts\PostsRepository $postsRepository) {
      $this->postsRepository = $postsRepository;

    }

...... 


PostsRepository.php

PHP Code:

<?php

class PostsRepository() {
    
    public function all(){

        return \application\models\Post_model->get_posts();

    }


} 


How can I solve this problem? Thank you!!!

I am interesting to.

AFAIK if you use the offical package of CI without extensions you cannot use namespaces with the main classes (controllers, models, libraries).
If you must use namespaced classes as controllers you have to redefine the loader or the CI base class.
You can find a possible implementation here: https://github.com/kenjis/codeigniter3-n...controller

Thanks. In my case I want to use Dependency Injection.