Question

I simply need to add a validation class that limits a numerical entry from being greater than 24.

Is this possible with CI’s default validation classes or will I have to write a custom validation class?

Answer 1

There’s no maximum or minimum comparison function in the Form Validation Rule Reference, so you can just write your own validation function.

It’s pretty straightforward. Something like this should work:

function maximumCheck($num)
{
    if ($num > 24)
    {
        $this->form_validation->set_message(
                        'your_number_field',
                        'The %s field must be less than 24'
                    );
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}


$this->form_validation->set_rules(
        'your_number_field', 'Your Number', 'callback_maximumCheck'
    );