问题
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 ignored. If I move the functions in the controller that is doing the form validation, everything works like a charm. My validation helper is autoloaded.
Is there any reason why I can't seem to use these validation functions if I put them in a helper? Thanks.
回答1:
A function in a helper and a controller are different obviously.
Create an extended MY_Form_validation.php in your libraries/, add the functions there and finally set the rules without callback_ and just their function name.
Example:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class MY_Form_validation extends CI_Form_validation {
/* set_rule('custom_require') */
function custom_require($str) {
return (bool)$str;
}
}
回答2:
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)
来源：https://stackoverflow.com/questions/10652870/codeigniter-custom-validation-rules-cant-be-in-a-helper