Error with Codeigniter HMVC validation callback - php

Question

I am using Codeigniter with HMVC .
When I validate my form, I use the solution to fix the callback problem in HMVC :
1.Extends CI_Form_validation:
<?php
// application/libraries/My_Form_validation.php
class MY_Form_validation extends CI_Form_validation {
public $CI;
}
?>
In my Controller :
class User extends MX_Controller {
function __construct() {
parent :: __construct();
$this->load->library('form_validation');
$this->form_validation->CI = & $this;
}
My problem is: in my localhost, everything is ok: callback validation run normally. But when I upload my project on host, i execute my controller it appears blank. When I comment the line
//$this->form_validation->CI = & $this;
The controller run normally again.
Could you tell me how i fix this problem?
Thanks for any help.

Answer 1

Check your error logs for any fatal errors, also you should extend my form validation this manner
class MY_Form_validation extends CI_Form_validation {
private $CI
function My_Form_validation($config = array()) {
parent::__construct($config);
$this->CI = &get_instance()
}
//example functions
function my_custom_validation(str){ //or override , for example, required
if($this->CI->method_from_instance()){
return true;
}
return false
}
}
and then use form_validation as you normally do, but now you have extra rule my_custom_validation
EDIT: if by any chance and for some wired reason you want to use controller functions in your library (aka $this) pass it as a config, once you load the library e.g. $this->load->library('form_validation', array(('ci'=>$this) //but i don't see why would you do that.