I have a callback function that check_captcha which sees if $row is ==0 or == 1 (this information is queried from sql).
$row
==0
== 1
The p
That helped me
go to application/config/autoload.php and add "Security" helper class there.
$autoload['helper'] = array('security');
Or add this before your form validation
$this->load->helper('security');