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Native session for CI 2.1.4

#1
[eluser]blasto333[/eluser]
I modified the following library to product native sessions

https://github.com/EllisLab/CodeIgniter/...ve-session

The only change I had to make was renaming destroy to sess_destroy.

Does anyone see and problems with the modifications for CI 2.1.4?


<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Code Igniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author Dariusz Debowczyk
* @copyright Copyright © 2006, D.Debowczyk
* @license http://www.codeignitor.com/user_guide/license.html
* @link http://www.codeigniter.com
* @since Version 1.0
* @filesource
*/

// ------------------------------------------------------------------------

/**
* Session class using native PHP session features and hardened against session fixation.
*
* @package CodeIgniter
* @subpackage Libraries
* @category Sessions
* @author Dariusz Debowczyk
* @link http://www.codeigniter.com/user_guide/li...sions.html
*/
class CI_Session {
var $session_id_ttl = 360; // session id time to live (TTL) in seconds
var $flash_key = 'flash'; // prefix for "flash" variables (eg. flash:new:message)

function CI_Session()
{
log_message('debug', "Native_session Class Initialized");
$this->_sess_run();
}

/**
* Regenerates session id
*/
function regenerate_id()
{
// copy old session data, including its id
$old_session_id = session_id();
$old_session_data = $_SESSION;

// regenerate session id and store it
session_regenerate_id();
$new_session_id = session_id();

// switch to the old session and destroy its storage
session_id($old_session_id);
session_destroy();

// switch back to the new session id and send the cookie
session_id($new_session_id);
session_start();

// restore the old session data into the new session
$_SESSION = $old_session_data;

// update the session creation time
$_SESSION['regenerated'] = time();

// session_write_close() patch based on this thread
// http://www.codeigniter.com/forums/viewthread/1624/
// there is a question mark ?? as to side affects

// end the current session and store session data.
session_write_close();
}

/**
* Destroys the session and erases session storage
*/
function sess_destroy()
{
//unset($_SESSION);
session_unset();
if ( isset( $_COOKIE[session_name()] ) )
{
setcookie(session_name(), '', time()-42000, '/');
}
session_destroy();
}

/**
* Reads given session attribute value
*/
function userdata($item)
{
if($item == 'session_id'){ //added for backward-compatibility
return session_id();
}else{
return ( ! isset($_SESSION[$item])) ? false : $_SESSION[$item];
}
}

/**
* Sets session attributes to the given values
*/
function set_userdata($newdata = array(), $newval = '')
{
if (is_string($newdata))
{
$newdata = array($newdata => $newval);
}

if (count($newdata) > 0)
{
foreach ($newdata as $key => $val)
{
$_SESSION[$key] = $val;
}
}
}

/**
* Erases given session attributes
*/
function unset_userdata($newdata = array())
{
if (is_string($newdata))
{
$newdata = array($newdata => '');
}

if (count($newdata) > 0)
{
foreach ($newdata as $key => $val)
{
unset($_SESSION[$key]);
}
}
}

/**
* Starts up the session system for current request
*/
function _sess_run()
{
session_start();

// check if session id needs regeneration
if ( $this->_session_id_expired() )
{
// regenerate session id (session data stays the
// same, but old session storage is destroyed)
$this->regenerate_id();
}

// delete old flashdata (from last request)
$this->_flashdata_sweep();

// mark all new flashdata as old (data will be deleted before next request)
$this->_flashdata_mark();
}

/**
* Checks if session has expired
*/
function _session_id_expired()
{
if ( !isset( $_SESSION['regenerated'] ) )
{
$_SESSION['regenerated'] = time();
return false;
}

$expiry_time = time() - $this->session_id_ttl;

if ( $_SESSION['regenerated'] <= $expiry_time )
{
return true;
}

return false;
}

/**
* Sets "flash" data which will be available only in next request (then it will
* be deleted from session). You can use it to implement "Save succeeded" messages
* after redirect.
*/
function set_flashdata($key, $value)
{
$flash_key = $this->flash_key.':new:'.$key;
$this->set_userdat


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