Extending the Session Library in Codeigniter 3

Question

I've been using CI for a while now and recently upgraded to CI 3. I noticed the Session library has now been moved to a folder. I used to have my own MY_Session.php file in the application/libraries folder that extended the default CI library.

I also use the autoload.php file to autoload my session library. This no longer works, as I get Unable to load the requested class: Session.

If I remove MY_Session.php file, then the pages load, but then I'll be missing my extended functionality.

Does anyone know how exactly to extend the session library in CI 3?

Answer 1

For the sake of completeness since 3.0 has long been released: if you want to extend the Session class, you need to add your extended class MY_Session.php to the application/libraries/Session directory to mimic its system/libraries/Session/Session.php counterpart.

After you have the correct directory structure, your MY_Session.php file should contain the usual way to extend system library classes, as @Starx has noted.

Answer 2

Currently it is impossible to do that, but there's a pending pull request that tries to solve the problem.

However, you shouldn't post questions related to yet unreleased software. Anything that is in a development stage might be changed again, become obsolete, etc. and your question here would automatically become irrelevant to everybody, including yourself. You should post/ask your questions on the repository itself (and search for an already existing issue of course).

Answer 3

It is possible to extend the Session class in CodeIgniter 3. Admittedly it is a bit of a kludge, but I only use this to fix a long-standing bug in the Session class anyways. Here is an example MY_Session.php library for CI3:

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

require_once SYSDIR . '/libraries/Driver.php';
require_once SYSDIR . '/libraries/Session/Session.php';

/*
    Change the following if you want to use a different driver.
*/
require_once SYSDIR . '/libraries/Session/drivers/Session_cookie.php';

class MY_Session extends CI_Session_cookie
{

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

    protected function _sess_update($force = false)
    {
        // Do NOT update an existing session on AJAX calls.
        if ($force || !$this->CI->input->is_ajax_request())
            return parent::_sess_update($force);
    }

}

/* End of file MY_Session.php */
/* Location: ./application/libraries/MY_Session.php */

For more info, or to keep up with this if it changes: http://degreesofzero.com/article/55

Disclosure: This is my personal blog.

Answer 4

I managed to extend CI_Session in Codeigniter 3.1.3. Here is what I did:

Create a file application/libraries/Session/MY_Session.php

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

class MY_Session extends CI_Session {

    public function __construct(array $params = array())
    {   
        if ( $this->ignore_sessions() )
            return;
        parent::__construct();
    }   

    function ignore_sessions()
    {   
        $uri = str_replace ("//", "/", $_SERVER['REQUEST_URI']);
        if ( strpos($uri, '/ignore_this_controller/') === 0 ) 
            return true;
        return false;
    }   
}  

You might also want to add 'session' to your config/autoload.php:

$autoload['libraries'] = array('session',....)