Question

Im carrying out some form validation with codeigniter using a custom validation callback.

$this->form_validation->set_rules('testPost', 'test', 'callback_myTest');

The callback runs in a model and works as expected if the return value is TRUE or FALSE. However the docs also say you can return a string of your choice.

For example if I have a date which is validated, but then in the same function the format of the date is changed how would I return and retrieve this new formatted value back in my controller?

Thanks for reading and appreiate the help.

Answer 1

I’m not entirely sure I got what you were asking, but here’s an attempt.

You could define a function within the constructor that serves as the callback, and from within that function use your model. Something like this:

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

class Controllername extends CI_Controller {

   private $processedValue;

   public function index()
   {
        $this->form_validation->set_rules('testpost','test','callback');

        if ($this->form_validation->run()) {
         //validation successful
         echo $this->processedValue; //outputs the value returned by the model
        } else {
         //validation failed
        }
   }

   private function callback($input)
   {
        $this->load->model('yourmodel');
        $return = $this->yourmodel->doStuff($input);

        //now you have the user's input in $input
        // and the returned value in $return

        //do some checks and return true/false

        $this->processedValue = $return;
   }

}