CodeIgniter - Session not working when redirecting to other Controller

Question

Session is not working out when redirecting from one controller to another. In below example, I am simply trying to check login and if valid user then set username to session from the Controller named "Login" and redirect to another controller "Testing" and print the session value. But, When the user is validated, session works fine till we are in Login controller (I checked by putting print_r($this->session->userdata('username')); by removing redirect method) and when I redirect, the session value shows empty from redirected Controller.

Here is the sample of my code:

Controller: Login.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Login extends CI_Controller
{
    public function __construct()
    {
        parent::__construct();
        $this->load->model('M_login');  
        $this->load->helper('url');
        $this->load->library('session');
        $this->load->helper('form');
    }
    public function index()
    {
        $u=$this->session->userdata('username');
        if($u) {
            redirect('Testing');
        } else {
            $this->load->view('login');
        }
    }
    public function login_form()
    {
        $this->form_validation->set_rules('username', 'Username', 'required');
        $this->form_validation->set_rules('password', 'Password', 'required');
        $this->form_validation->set_error_delimiters('<span class="error">', '</span>');

        if($this->form_validation->run()==FALSE)
        {
            $this->load->view('login');
        }
        else{
            $result = $this->M_login->takeUser();
            if(count($result)>0)
            {
                $user = $this->input->post('username', TRUE);

                $this->session->set_userdata('username', $username);

                redirect('Testing');
            }
            else{
        ?>
            <script>            
            alert('Failed Login: Check your username and password!');       
            history.go(-1);         
            </script>   
        <?php   
            }   
        }
    }
    public function logout()
    {
        $this->session->sess_destroy();
        redirect('login/login_form');
    }
}

Model: M_login.php

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

class M_login extends CI_Model

{

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

    public function takeUser()  
    {   
        $username = $this->input->post('username');
        $password1 = $this->input->post('password');
        $password = md5($password1);

        $this->db->select('username');  
        $this->db->from('employee');    
        $this->db->where('username', $username);    
        $this->db->where('password', $password);    
        $result = $this->db->get();
        return $result->row_array();
    }
}

Controller: Testing.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Testing extends CI_Controller
{
     public function __construct(){
        parent::__construct();
        $this->load->library('session');
    }

    public function index() {
        print_r($this->session->userdata('username'));

    }

}

Also I have autoload session:

$autoload['libraries'] = array('database','session','form_validation', 'pagination', 'user_agent','encryption');

There's no need to load the session library on each controller if you're already autoloading it. Having said that, print_r needs an echo or print statement before it... Have you tried print print_r($this->session->userdata('username')); ? — Javier Larroulet
Avoid loading session library in controllers. Use autoload array defined in config.php — Riosant
@JavierLarroulet: I tried removing session from other controller, i.e. loading session only from autoload, and tried echo or print, but still showing empty result in session. — Rajesh Basnet
@Riosant: removed loading session library in controllers but still same result. — Rajesh Basnet

DFriend DFriend · Accepted Answer · 2020-02-09T07:24:02

The problem is probably in these lines of code from Login.php

$user = $this->input->post('username', TRUE);

$this->session->set_userdata('username', $username);

Notice that the variable $user is set with the value from $_POST['username'], but then contents of $username is stored in the session.

Try this

$user = $this->input->post('username', TRUE);

$this->session->set_userdata('username', $user);

CodeIgniter - Session not working when redirecting to other Controller

2 Answers