CI2 to CI3: Call to a member function helper() on a non-object in ...Session.php

However, if you were using that file as a controller somewhere else on your site, you probably already broke it by removing the base constructor.

You are right, I went too fast, it doesn't work

A class extending CI_Controller can't load another class which also extends CI_Controller. You will probably need to replace the second controller with a library.

It worked with CI2, in my opinion it should be noted in CI3 the upgrade guide.

I don't know how to transform this class to a library. I changed the Plan_Events class to not extend the CI_Controller but assigning a CI instance because I need to use the CI models, now it seems to work:

PHP Code:

class Plan_Events {
    public function __construct()

    {
        $this->CI =& get_instance();
    }
    public function beforeInsert($data)

    {
        $this->CI->load->model('example_model');
        $this->CI->example_model->scheduler_insert($data);
    }
    ...
} 


Please tell me if it isn't a good practice. Note that I'm using Plan_Events to integrate the DHTMLX library like this:

PHP Code:

class Controller_A extends CI_Controller
{
  ...
  public function get_events()
  {
    ...
    require_once("assets/dhtmlx/dhtmlxConnector/codebase/scheduler_connector.php");
    require_once("Plan_Events.php");
    $conn = new SchedulerConnector($this->db, "PHPCI");
    $conn->event->attach(new Plan_Events()); // Update/Delete/...
    ...
  } 


Thx for the support