Extending form validation in Codeigniter

Question

I have placed this class file called \'My_Form_validation.php\' into \'application/core\' and I have also tried placing it in \'application/libraries\'.

In my contro

Answer 1

I know this is old, but just in case someone else stumbles on this in the modern day like I did, here's a quick example. (Currently using 3.0.6, but I believe this will work on 2 as well.)

class MY_Form_validation extends CI_Form_validation { // Capitalization matters

  protected $CI;

  public function __construct() {
      parent::__construct();
  }

  /**
   * Valid Date
   *
   * Verify that the date value provided can be converted to a valid unix timestamp
   *
   * @param string  $str
   * @return    bool
   */

  public function valid_date($str) {
      $CI = $this->CI =& get_instance(); // Get your CodeIgniter instance

      if (($str = strtotime($str)) === FALSE) { // Basic timestamp check
          // Set error message by calling the method through the CI instance.
          // Obviously must be done BEFORE returning any value
          $this->CI->form_validation->set_message('valid_date', '{field} must be a valid date.');
          return FALSE;
      }

      return TRUE;
    }
}

Answer 2

Because you're extending a CodeIgniter library and not a core component, you want to place that in application/libraries (not application/core).

And of course, don't forget to load the Form_validation library within your controller code.

$this->load->library('form_validation');

Other things to check:

• Filename case sensitivity (MY_Form_validation.php loads while My_Form_validation.php won't)
• Class name case sensitivity (class MY_Form_validation extends CI_Form_validation)

Reference material:

• Extending Core Classes
• Extending Native Libraries

Answer 3

You have to add $rules on your __construct method and also pass this to parent constructor

eg:

function __construct($rules = array())
{
    parent::__construct($rules);
}

Look at Form_validation and provide same variables.