How to load model from hooks file in ci3 [duplicate] - codeigniter

Question

This question already has answers here:
How do I load my models inside a codeigniter hook file
(2 answers)
Closed 5 months ago.
I'm trying to learn how to use hooks in ci3, is it possible to load a model from hooks file in CI3? because when I try to load the model it gives me this error:
A PHP Error was encountered
Severity: Warning
Message: Undefined property: Http_request_logger::$load
Filename: hooks/http_request_logger.php
Line Number: 9
And
An uncaught Exception was encountered
Type: Error
Message: Call to a member function model() on null
Filename: D:\xampp\htdocs\vobot-cms\application\hooks\http_request_logger.php
Line Number: 9
and here's my hooks code:
<?php
if (!defined('BASEPATH'))
exit('No direct script access allowed');
class Http_request_logger {
public function activity_user() {
$CI = & get_instance();
$this->load->model('./activity_user/MActivityUser');
// log_message('info', 'GET --> ' . var_export($CI->input->get(null), true));
$post = log_message('info', 'POST --> ' . var_export($CI->input->post(null), true));
// log_message('info', '$_SERVER -->' . var_export($_SERVER, true));
$this->MActivityUser->insertLogActivity( $data = array(
'username' => (!$this->MActivityUser->getUsername() ? NULL : $this->MActivityUser->getUsername()),
// 'domain' => $_SERVER["SERVER_NAME"],
'menu_name' => $_SERVER["REQUEST_URI"],
'activity' => $post,
// 'ip' => $this->CI->input->ip_address(),
'create_date' => date('Y-m-d H:i:s'),
'cms_id' => $this->MActivityUser->getUserId()
));
return $data;
}
}

Answer 1

The error is that you are loading the CI instance into the $CI variable but you are not using it to load your model.
$CI = & get_instance();
$this->load->model('./activity_user/MActivityUser');
should be
$CI = & get_instance();
$CI->load->model('./activity_user/MActivityUser');