codeigniter form callback value

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.

a vote down without a comment? A bit harsh. I did look to see if the question exists. the closest I found was: stackoverflow.com/questions/9486274/… which didnt answer my question — fl3x7
– fl3x7, Commented May 16, 2012 at 22:37
I have no idea why you got votedown but here's +1 from me. This question is a good question. — itachi
– itachi, Commented May 17, 2012 at 2:31

Ayush · Accepted Answer · 2012-05-16 23:42:58Z

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;
   }

}

edited May 16, 2012 at 23:42

answered May 16, 2012 at 22:59

Ayush

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4 Comments

fl3x7 Over a year ago

Sorry about it being unclear. Maybe thats why someone downvoted. What I meant was when a value is validated in the callback function which is in my model it is also processed, in this case the format of the submitted date is changed. I wanted to return this new value so that I can then use it in my controller. thanks for your help

Ayush Over a year ago

In my example above, when your model returns the value to the callback in the controller, you can assign this processed value to a private variable. The value will then be accessible as you need. See edit.

Ayush Over a year ago

@fl3x7: Did that solve your issue? Was that what you were looking for?

fl3x7 Over a year ago

yep that works although what im thinking of doing is moving the callabck functions into the controller and just assign the new variable to $this->data['something']. Although I know this goes against the skinny controller fat model principal. Thanks for your help mate :)

Banty Roy · Accepted Answer · 2014-08-14 11:40:32Z

1

public function myTest($data){ // as the callback made by "callback_myTest"
     // Do your stuff here
    if(condition failed)
    {
        $this->form_validation->set_message('myTest', "Your string message");
        return false;
    } 
    else 
    {
       return true;
    }
}

Please try this one.

answered Aug 14, 2014 at 11:40

Banty Roy

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Comments

mgaghdam · Accepted Answer · 2012-05-16 22:49:14Z

0

I looked at function _execute in file Form_validation of codeigniter. It sets var $_field_data to the result of callback gets(If the result is not boolean). There is another function "set_value". Use it with the parameter which is name of your field e.g. set_value('testPost') and see if you can get the result.

answered May 16, 2012 at 22:49

mgaghdam

912 bronze badges

1 Comment

fl3x7 Over a year ago

Thanks for your reply. So im returning the new string and then echoing set_value('testPost') but the value is still the original pre-processed value.

Freelance Developer Melbourne · Accepted Answer · 2013-09-26 00:52:26Z

0

The way Tank_Auth does this in a controller is like so

$this->form_validation->set_rules('login', 'Login', 'trim|required|xss_clean');

if ($this->form_validation->run()) {        
// validation ok

$this->form_validation->set_value('login')

}

Using the set_value method of form_validation is undocumented however I believe this is how they get the processed value of login after it has been trimmed and cleaned.

I don't really like the idea of having to setup a new variable to store this value directly from the custom validation function.

answered Sep 26, 2013 at 0:52

Freelance Developer Melbourne

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Comments

ssaltman · Accepted Answer · 2013-10-28 16:52:55Z

edit: sorry, misunderstood the question. Use a custom callback, perhaps. Or use the php $_POST collection (skipping codeigniter)...apologies haven't tested, but I hope someone can build on this...

eg:

function _is_startdate_first($str)
{
           $str= do something to $str;

            or 

            $_POST['myinput'} = do something to $str;

    }

================

This is how I rename my custom callbacks:

$this->form_validation->set_message('_is_startdate_first', 'The start date must be first');

.....

Separately, here's the callback function:

function _is_startdate_first($str)
{
    $startdate = new DateTime($this->input->post('startdate'), new DateTimeZone($this->tank_auth->timezone()));
    $enddate = new DateTime($this->input->post('enddate'), new DateTimeZone($this->tank_auth->timezone()));

    if ($startdate>$enddate) {
        return false;
        } else {
        return true;
        }
}

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