Lose session data

[Hoang]

Hi, I am having a problem:
in my code there is a big session variable, an associative array with a lot of elements. Randomly I don't understand why the session variable loses all values of the elements, means all elements in the array are set to empty string. I check and see the session id still exist.
My configuration is: Apache 1.2.36, PHP 4.3.3 (also use 4.2.2 and still problem)

I tested on very powerful server, everything runs very quickly and I have no problem above.
I tested on some IE version (5.0, 5.5) with patches, I also have no problem.

I have problem with a normal server, P4 256 MB, one user log in.
I also have problem with IE 5.5 and IE 6.0

Does anybody experience this, please give me an advice...

Thank you very much,

Hoang

[planetsim]

can you show us some code..

Id say more likely than not you havent put session_start(); on the top of each file that needs access to the session.

[Hoang]

I call this popup wizard

    <script>
            if (document.main_form.wizard_opened.value==\'\') {
               	popup_wizard = window.open(\''.POPUP_SALES_CHANNELS_CREATION_WIZARD.'?form_action=edit&sales_channels_id='.$_SESSION['current_organizer'].'&'.session_name().'='.session_id().'\',\'\',\'width=800,height=600,top=\'+(screen.height-600)/2+ \',left=\'+(screen.width-800)/2+ \',resizable=yes,scrollbars=yes,windowstate=maximize\');
                document.main_form.wizard_opened.value = 1;
                document.main_form.form_modified.value = 0;
                if (document.main_form.screen_cache_modified != null) {
                    document.main_form.screen_cache_modified.value = 0;
                }
            }
        </script>

In the popup:

define ('TOOLS_TICKETCENTER', dirname(FILE).'/../../../tools/ticketcenter');
define ('OBJECT_STORED_IN_SESSION',TOOLS_TICKETCENTER.'/lib/tr3/object/objects.class.php');
define ('PASSED_SHARED_CONTEXT_IN_SESSION',TOOLS_TICKETCENTER.'/lib/tr3/passedsharedcontext/passed_shared_context.class.php');
define ('CONCURRENCY_CONTROLLER_IN_SESSION',TOOLS_TICKETCENTER.'/../concurrencycontrol/data/concurrency_controller.class.php');
//objects stored in session must be define before session start
require_once(OBJECT_STORED_IN_SESSION);
require_once(PASSED_SHARED_CONTEXT_IN_SESSION);
require_once(CONCURRENCY_CONTROLLER_IN_SESSION);

session_start();

// make it never cache on the client browser
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0

require_once(dirname(FILE).'/../config.php');

if (USE_CLICKSTREAM) {
list($usec, $sec) = explode(" ",microtime());

global $start_time;
$start_time = ((float)$usec + (float)$sec);

}

The headache is I don't have this problem with IE on one of my coworker, on our integration server (very powerful).

[Hoang]

My coding is like this:

I have a screen which shows information in tabs. I store this information in a big array in session, through the tabs I store the values into the session.

The screen also have a link (lable is New), when click on New link it opens a wizyrd popup, with the same structure as the inforamtion above but displayed in steps (Back, Next) instead of tabs. For the popup I use the same variable to store values between steps, actually it is the same code, but different session variable.

I have no problem with the screen with tabs, but I have problem with the wizard popup. At the first and second steps, it is OK. THe data is stored into session and displayed correctly, but at later steps (randomly any steps), the session data lose their values that are set at the previous steps.