Bug #15909 Updated: Session data not updated on page jump

ID: 15909 Updated by: yohgaki@php.net Reported By: phpbug@ehrlichorg.com Status: Open Bug Type: Session related Operating System: Linux Gnu 2.2.12 PHP Version: 4.1.2 New Comment: Do you use MySQL? Previous Comments: ------------------------------------------------------------------------ [2002-03-25 21:15:04] phpbug@ehrlichorg.com PHP Does not appear to be seg faulting; nothing in the logs indicates that type of error. ------------------------------------------------------------------------ [2002-03-25 05:09:49] yohgaki@php.net Hmm. It sounds like PHP is segfaulting. (Or bailing out without proper shutdown) If you are having segfualts, could you build PHP with --enable-debug and send the backtrace? ------------------------------------------------------------------------ [2002-03-25 03:18:27] irenem@ms2.hinet.net It looks like the PHP 4.1.2 forgot to call session_write_close() by default. I added this call at the end of my program, and solved this session problem. ------------------------------------------------------------------------ [2002-03-20 06:07:11] johnsparrowuk@yahoo.com Interesting workaround: session_register("lastaction"); session_register("userip"); session_register("lines"); // etc etc $HTTP_SESSION_VARS["xx"] = "Anything"; // this is the magic bit Although xx isn't a registered session var, and doesn't get stored in the session, it seems to stimulate PHP to update the session vars in the file! With that addition, my apps now work fine under 4.1.2.. (Win 2k, Apache 1.3.23) John ------------------------------------------------------------------------ [2002-03-18 11:19:08] phpbug@ehrlichorg.com Here is part of what is going wrong. PHP starts out with each session variable appearing as a global and also in $_SESSION. Initially these are linked by reference (not clear how) and contain the same data. On my pages this linkage appears to get broken so the contents $GLOBALS['S'] and $_SESSION['S'] are not the same. $GLOBALS contains the latest data, $_SESSION contains the data as of the start of the page. Consequently changes to the $_SESSION variable are not being saved between pages. My work around is to use the following at the end of each page for $S: if ( !($_SESSION['S'] === $S) ) $_SESSION['S'] = $S; This updates the contents of the $_SESSION variable if it is not longer the same as the global. Based on a comment from one of the developers, the problem may relate to having a global declaration for a session variable that appears outside a function scope. I have these declarations on each of my pages because PHP used to require them. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/15909 -- Edit this bug report at http://bugs.php.net/?id=15909&edit=1