After redirect session lost in codeigniter - codeigniter

Question

The session value lost after the redirect. I m redirecting from pay_order method to do_payment method. when I print the session value in do_payment method its return false. just simple calling the do_payment method display the session value. Please help what is the problem with redirect..?
function pay_order($order_id)
{
$this->load->helper('url'); //loading url helper
$this->load->library('session');//loading session lib
$this->load->library('cart'); //loading cart lib
$this->load->helper('form');//loading form helper
$output = $this->cart->contents();// getting data from cart.
$output = $this->sort_array($output);// sorting the array
$list['data'] = $output;
$list['order_id'] = $order_id;
$this->session->set_userdata('abc', $list);// setting the session
redirect('checkout/do_payment'); // redirecting to do_payment
}
function do_payment()
{
$this->load->helper('url'); //loading url helper
$this->load->library('session'); //loading session library
$arr = $this->session->userdata('abc');// getting session data in $arr
var_dump( $arr );// return false value.
//$this->load->view('order/pay_through_gateway');
}
when I redirect from pay_order method the session is not available in do_payment method. why?

Answer 1

There is a problem, check the line in the method pay_order() where you are setting the session.
$list['order_id'] = $order_id
$this->session->set_userdata('abc', $list);// setting the session
Before that line you have missed semicolon. And everything looks fine.
Update:
There is no error as I think, check whether you may have null value while you are storing the values in session. And check the values by following code in do_payment() method.
function do_payment(){
$this->load->library('session'); //loading session library
$arr = $this->session->userdata('abc');// getting session data in $arr
print_r( $arr );// print the $arr content
}

Answer 2

Change this:
$list['order_id'] = $order_id
To this:
$list['order_id'] = $order_id;
You have a semicolon missing. You do not see any errors because of the redirection.