CODEWITHSUNDEEP
phpcodeigniter
DeiForm
DeiForm

Reputation: 664

CodeIgniter extending library + using another library

I am trying to extend form validation library with this code:

class MY_Form_validation extends CI_Form_validation {

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

    public function check_captcha($captcha)
    {
        if ($captcha == $this->session->userdata('captcha'))
        {
            return TRUE;
        }   else
        {
            $this->form_validation->set_message('check_captcha', "Please copy captcha again.");
            return FALSE;
        }
    }
}

When I run validation I get this error:

Message: Undefined property: MY_Form_validation::$session
Filename: libraries/MY_Form_validation.php

I tried to load the session library at construct but I got again error. Is there any option to use session library inside or should I pass the value from session as 2nd parameter?

Upvotes: 0

Views: 2493

Answers (2)

Jon B
Jon B

Reputation: 507

libraries in codeigniter must get an instance of the CI object (what you'd think of as $this when calling session).

add the following to your contructor function:

$CI =& get_instance();

now when referencing properties/methods of the CI object, just use $CI instead of $this:

if($captcha == $CI->session->userdata('captcha'))

and so on. So use $CI when needing something outside of the library, otherwise, you can use $this

Upvotes: 0

devrooms
devrooms

Reputation: 3149

If you need to access another loaded library from within a library, you need access to the codeigniter instance.

As you are extending the existing Form Validation library, you can access the codeigniter instance by using:

$this->CI

So, in your case, you can access the session by using:

$this->CI->session->userdata('captcha')

Upvotes: 2

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