CODEWITHSUNDEEP
phpregexcodeignitervalidation
Rixhers Ajazi
Rixhers Ajazi

Reputation: 1313

Extending Validation Library - CI2

I need a to set up a validation for student ID's and the CI native library is not cutting it, so I extended. I however am having an issue getting it work, and I don't quite know where I am goofing up. This is my first crack at REGEX so go easy on me. Here is my Code : 

<?php

 if(!defined('BASEPATH')) exit('No direct script access allowed');

 class MY_Form_validation extends CI_Form_validation
 {

     public function is_valid_student_id($str)
     {
         if(strlen($str) > 9)
         {
             $this -> set_message('is_valid_student_id', 'A-Number can not be over 9 characters');
             return FALSE;
         }
         elseif(strlen($str) < 9)
         {
             $this -> set_message('is_valid_student_id', 'A-Number can not be under 9 characters');
             return FALSE;
         }
         elseif((($str[0]) !== 'a') && (($str[0]) !== 'A'))
         {
             $this -> set_message('is_valid_student_id', 'A-Number must begin with the letter "A"');
             return FALSE;
         }
         elseif(ctype_alpha($str[0]))
         {
             if(is_numeric(substr($str, 1, strlen($str) - 1)))
             {
                 return TRUE;
             }
             else
             {
                 $this -> set_message('is_valid_student_id', 'A-Number must have 8 digits 0 - 9');
                 return FALSE;
             }
         }
         else
         {
             $this -> set_message('is_valid_student_id', 'A-Number must begin with the letter "A"');
             return FALSE;
         }

     }

 }

Then to use the validation I do this : 

if (!$this->input->post('student') == 'yes') {
    $this->form_validation->set_rules('anum', 'A Number', 'required|is_valid_student_id|exact_length[9]');
}

I've been following these good /// tutorials, but I am still a little confused. Any help would be great. Thank you

Upvotes: 0

Views: 94

Answers (2)

Nishant Lad
Nishant Lad

Reputation: 616

I think no need to extend the library just make one callback method in your controller and add above code in it...Just Make one method called is_anum and put your code In it 

if (!$this->input->post('student') == 'yes') {
            $this->form_validation->set_rules('anum', 'A Number', 'required|callback_is_anum|exact_length[9]');
        }

function is_anum($str)
{
if (((substr($str, 0) !== 'a') || substr($str, 0) !== 'A') && (!preg_match("/[^0-9]/", $str) )) // If the first character is not (a or A) and does not contain numbers 0 - 9 
        { // Set a message and return FALSE so the run() fails
            $this->set_message('is_anum', 'Please enter a valid A-Number');
            return FALSE;
        } else 
        {
            return TRUE;
        }
    }

Upvotes: 0

cwallenpoole
cwallenpoole

Reputation: 82028

If you're using the callback_ syntax, then the function called needs to be on the controller. If you're adding it to the Form_Validation library directly, though, you don't need callback_. Try this:

$this->form_validation->set_rules(
      'anum', 'A Number', 'required|is_anum|exact_length[9]');

Upvotes: 2

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