How to take some functions from controllers to a higher level?

Question

CodeIgniter

Good afternoon
I comprehend CODEIGNITER
There are some functions that are used in any section of the site ...
T e - these functions need direct access from any controller
How to implement it correctly?
I did this: (but I feel that this is not the right approach)
in routes: further Main.php itself
$route['default_controller'] = 'main';

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
require_once('Base.php');

class Main extends Base {

    public function __construct(){
        parent::__construct();
    }

Base class

<?php
class Base extends CI_Controller{

    public function __construct(){
        parent::__construct();
    }
}

And in Base I add all the "universal" functions ....
All other controllers, as well as main, are inherited from Base
How to do it all right?

Answer 1

Make Helper (if the methods are not related to the controller functionality), otherwise, customize the parent controller, and inherit yours from it.

Answer 2

If you use these functions in controllers, this is correct.
If you use these functions in templates, then it is logical to make helpers.

Answer 3

For such lazy cases, I made a model, stuck it into autoload. And then I call anywhere in the template or controller.
Like <?=$this->mymodel->get_url_logo()?>