Session data is losing with Flash

Question

I'm using Flash uploader(uploadify, swfupload) with CodeIgniter, want to get the session data. I have found out that the flash does not send the session data, so I have set $config['sess_match_useragent'] = FALSE;

Now for example i have set session value myname in session and I can get it on my backend PHP script using Internet Explorer. :

Array
(
    [session_id] => f4l82aa3f82rd4b2ed682e0e132d7a72
    [ip_address] => 127.0.0.1
    [user_agent] => Shockwave Flash
    [last_activity] => 1310546544
    [myname] => test
)

But the problem is that it works fine ONLY on Internet Explorer. On Internet Explorer, the session_id remains same before and after using flash. But on the Firefox and all other browsers, the session_id is Changed and I can get only session_id, ip_address, user_agent, last_activity BUT not myname.

Array
(
    [session_id] => c2cafff6daadc5148e6646s8c4c2aafa
    [ip_address] => 127.0.0.1
    [user_agent] => Shockwave Flash
    [last_activity] => 1310548338
)

By browsing and asking the previous questions on SO, I found out that since the Flash deletes the session data, I should send the current Session ID to the backend script and then restore the session using that session ID. So I am setting the session_id using original session ID.

$original_session_id = $_REQUEST['session_id'];
$newdata = array(
            'session_id'  => $original_session_id,                   
               );
    $this->session->set_userdata($newdata);

Now I can see that the session ID is set successully and it is same as previous, but the problem is that I still can not get the other session data, such as myname. Why is that so? Shouldnt I get it because now my session_id is same. Where does the session data goes and how can I retrieve it now?

Answer 1

You could reopen the session using session_id() as follows...

session_id($original_session_id);
session_start();

$this->session->set_userdata($_SESSION);