How to prevent auto logout in codeigniter? - php

Question

i am using codeigniter
with ion_auth configured ,and MySQL as back-end,
my app run smoothly but sometime/not randomly when i call add/update functions it automatically log me out.
i am working on it for last 1 months but found no solution so far ?
i also change setting in ion_auth config file.
$config['user_expire'] = 0;
any idea ,solution to this problem?
please comment ,so that i can provide more data if needed.
Note: i have also check this but no luck.

Answer 1

You are probably performing ajax requests, this is a common issue...
I would suggest you to use session database and make ajax calls is to not update the session...
Make this on you session class
class MY_Session extends CI_Session {
public function sess_update()
{
$CI =& get_instance();
if ( ! $CI->input->is_ajax_request())
{
parent::sess_update();
}
}
}

Answer 2

Create a session library with your own MY_Session.php library that overwrote the sess_update method with one that only executed the update method when not an AJAX request:
MY_Session.php
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
require_once BASEPATH . '/libraries/Session.php';
class MY_Session extends CI_Session
{
function __construct()
{
parent::__construct();
$this->CI->session = $this;
}
function sess_update()
{
// Do NOT update an existing session on AJAX calls.
if (!$this->CI->input->is_ajax_request())
return parent::sess_update();
}
}
Location of file:
/application/libraries/MY_Session.php */
You can either auto-load this library from config/autoload.php:
$autoload['libraries'] = array( 'MY_Session');
Or, you can load it later:
$this->load->library('MY_Session');
What this sess_update(); does?
In your system/libraries/Session.php there is a function sess_update() that automatically update your last activity.This function update the session every five minutes by default.
public function sess_update()
{
// We only update the session every five minutes by default
if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
{
return;
}
// _set_cookie() will handle this for us if we aren't using database sessions
// by pushing all userdata to the cookie.
$cookie_data = NULL;
/* Changing the session ID during an AJAX call causes problems,
* so we'll only update our last_activity
*/
if ($this->CI->input->is_ajax_request())
{
$this->userdata['last_activity'] = $this->now;
// Update the session ID and last_activity field in the DB if needed
if ($this->sess_use_database === TRUE)
{
// set cookie explicitly to only have our session data
$cookie_data = array();
foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
{
$cookie_data[$val] = $this->userdata[$val];
}
$this->CI->db->query($this->CI->db->update_string($this->sess_table_name,
array('last_activity' => $this->userdata['last_activity']),
array('session_id' => $this->userdata['session_id'])));
}
return $this->_set_cookie($cookie_data);
}
// Save the old session id so we know which record to
// update in the database if we need it
$old_sessid = $this->userdata['session_id'];
$new_sessid = '';
do
{
$new_sessid .= mt_rand(0, mt_getrandmax());
}
while (strlen($new_sessid) < 32);
// To make the session ID even more secure we'll combine it with the user's IP
$new_sessid .= $this->CI->input->ip_address();
// Turn it into a hash and update the session data array
$this->userdata['session_id'] = $new_sessid = md5(uniqid($new_sessid, TRUE));
$this->userdata['last_activity'] = $this->now;
// Update the session ID and last_activity field in the DB if needed
if ($this->sess_use_database === TRUE)
{
// set cookie explicitly to only have our session data
$cookie_data = array();
foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
{
$cookie_data[$val] = $this->userdata[$val];
}
$this->CI->db->query($this->CI->db->update_string($this->sess_table_name, array('last_activity' => $this->now, 'session_id' => $new_sessid), array('session_id' => $old_sessid)));
}
// Write the cookie
$this->_set_cookie($cookie_data);
}

Answer 3

Replace line 346 in system/libraries/Session.php (function sess_update())
if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
With:
if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now || $this->CI->input->is_ajax_request())
hope this works for you .

Answer 4

this is best answer.
codeignter controller
function fetchSendToProduction($sku,$old_fab_id)
{
if($this->input->is_ajax_request() > 0)
{
$result = $this->ifmodel->fetchSendToProduction($sku,$old_fab_id);
echo json_encode($result);
}
}
codeignter view ajax call
$.ajax({
type: "POST",
url: "<?php echo base_url(); ?>index.php/inputFactor/fetchSendToProduction/" + sku+'/'+old_fab_id ,
cache: false,
processData: false,
success: function(data)
{
}
});