CodeIgniter: custom validation rules can't be in a helper?

Question

I\'ve created a \"validation helper\" that was supposed to have all my custom validation rules. The problem is that when I use them in my form validation, they seem to be ig

Answer 1

Robin's answer is the easiest way to deal with it; however, the why you can't is this:

look in your system/libraries/Form_Validation.php, line: 587

if ( ! method_exists($this->CI, $rule))
{
  continue;
}

This check is done on all callbacks. Helpers are not classes & not loaded into the CI instance - and so not available from the Form_Validation library (because of the way it is specifically coded in this method)