CodeIgniter Session Data not working - php

Question

I'm creating a session at login but it's not saving the variables I store inside the session nor is it carrying them across to other pages:
Controller code:
function CheckDatabase($password) //This function is only run when password validation is correct.//
{
$username = $this->input->post('Username'); //Sets the username as a $username.//
$result = $this->User_model->Login($username, $password);
if($result)
{
$sess_array = array();
foreach($result as $row)
{
$sess_array = array( //Makes an array of the data to be stored in the session.//
'UserID' => $row->UserID,
'Username' => $row->Username
);
$this->session->set_userdata('logged_in', $sess_array); //Sets $sess_array as the session.//
}
return TRUE;
}
else //Ran if the username or password aren't matched in the CIUsers database. Returns error message.//
{
$this->form_validation->set_message('CheckDatabase', 'Invalid login details.');
return false;
}
}
Index function on the same controller (which should stop a user going back to the login screen but doesn't)
function index() //Default function that is run when this controller is called.//
{
if($this->session->userdata('logged_in'))
{
redirect('Home_controller');
}
else
{
$this->load->helper(array('form'));
$this->load->view('Login_view');
}
}
Code on the home view (which browser is directed to once logged in)
<?php echo $UserID .": ".$Username; ?>
I get this error for displaying the session data:
Message: Undefined variable: Username
Filename: views/Home_view.php
Line Number: 9

Answer 1

To retrieve the session variable, you have to do like this
$username = $this->session->userdata['logged_in']['Username'];
echo $username;

Answer 2

You have to retrieve it from session like this before using:
$user = $this->session->userdata('logged_in');
$Username = $user['Username'];
$UserID = $user['UserID'];

Answer 3

Try like this
$newdata = array(
'user_id' => $rows->id,
'user_name' => $rows->name,
'user_image' => $rows->user_image,
'user_email' => $rows->email,
'logged_in' => TRUE,
'user_type' => $rows->user_type
);
}
$this->session->set_userdata($newdata);
And check in your controller construct for user session
<?php
if (!defined('BASEPATH'))
exit('No direct script access allowed');
class User extends CI_Controller {
public function __construct() {
parent::__construct();
//Here we will check for the session value if it is true then the function will run else it will redirect to login page
if ($this->session->userdata('logged_in') == FALSE) {
redirect(site_url('your login page'));
} else {
// if there is session value
redirect(site_url('User/your function name');
}
}
}
?>
For complete explaination read this tutorial
http://w3code.in/2015/10/session-handling-in-codeigniter/

Answer 4

if($result)
{
$sess_array = array();
foreach($result as $row)
{
$sess_array = array( //Makes an array of the data to be stored in the session.//
'UserID' => $row[0]->UserID,
'Username' => $row[0]->Username
);
$this->session->set_userdata('logged_in', $sess_array); //Sets $sess_array as the session.//
}
return TRUE;
}