CodeIgniter, set_flashdata not working after redirect

Question

set_flashdata is not working directly after redirect with only one redirect.

I am using one controller in this process - Profilers' Controller. It handles the member confirmation process and also displays the login page on the redirect. The process is as follows:

1. this session set_flashdata ('topic', 'newmember')

2. redirect ('login')

3. route ['login'] = 'profilers/signIn'

4. topic = $this session flashdata ('topic')

I have turned off all database session configuration for cleaner debugging and even though session library is turned on in configs, I have started calling it anyways which doesn't seem to work either.

Here is my code. As you can see, I am sending path info to a log file path.log:

in controller Profilers, function confirmMember:

public function confirmMember()
  {
    //use_ssl();
    $this->form_validation->set_rules('handle', 'Unique Member Name', 'trim|xss_clean|required|min_length[5]|max_length[30]');
    $this->form_validation->set_rules('confirmation', 'Confirmation Code', 'trim|xss_clean|required|min_length[20]|max_length[20]|alpha_numeric');

    if ($this->form_validation->run() === FALSE) {echo "here";exit;
      $data['handle']=$this->input->post('handle');
      $data['confirmation']=$this->input->post('confirmation');
      $this->load->view('signing/defaults/header',$data);
      $this->load->view('defaults/heading',$data);
      $this->load->view('defaults/banner');
      $this->load->view('defaults/banner_right');
      $this->load->view('member/temp/index',$data);
      $this->load->view('defaults/footer',$data);
    } else {

      $post = $this->input->post(NULL,TRUE);
      $data['member'] = $this->Signing_model->model_confirmMember($post);

  if ($data['member']['confirmed']!==FALSE) {
    /* PATH CHECK */ 
    error_log("member confirmation not false\n",3, LOG_DIR.'path.log');
    unset($post);
    $this->session->sess_destroy();
    $this->session->set_flashdata('topic', 'newmember');
    // $this->session->keep_flashdata('topic');
    redirect('login','refresh');
  } else {
    /* PATH CHECK */ 
    error_log("member confirmation IS FALSE\n",3, LOG_DIR.'path.log');
    $this->load->view('member/temp/index',$data);
  }

My log file shows that the path is using the correct path and showing "member confirmation not false".

I have tried with keep_flash data on (which I assumed wouldn't work since there are no other redirects) and off.

I have also tried redirect without 'refresh'.

In config/routes.php:

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

$route['join'] = 'profilers/joinUp';
$route['login'] = 'profilers/signIn';
...

Login page uses Profilers Controller, signIn function as show above:

public function signIn()
{
  $topic = $this->session->flashdata('topic');
  if (isset($topic)) {
      $message = "topic is set. topic = ".$topic."\n";
      if ($topic!==FALSE) {
              error_log("flash var topic is not false\n", 3, LOG_DIR.'path.log');
      } else {
              error_log("flash var topic is FALSE\n", 3, LOG_DIR.'path.log');
      }
  } else {
      $message = "topic is NOT set\n";
  }
  error_log($message,3,LOG_DIR.'path.log');

  exit;
  ...
  ...
}

log file is showing that topic is set but is false.

"flash var topic is FALSE"

"topic is set. topic = "

Of course topic var not set since it is FALSE.

As you can see, I have moved the get flash data function to the beginning of my controller function to bypass anything that may be corrupting data.

Answer 1

You may need to start the session again after you have destroyed it.

Try adding this after your call to sess_destory():

$this->session->sess_create()

Alternatively you could avoid destroying the session, and unset() the values you wish to get rid of.