Doc #63278 [NEW]: Session locking is not described at all

From: sven at rtbg dot de Operating system: any PHP version: Irrelevant Package: Session related Bug Type: Documentation Problem Bug description:Session locking is not described at all Description: ------------ --- From manual page: http://www.php.net/function.session-set-save-handler --- Session locking is not described at all. The callbacks for "open" and "close" must aquire a write lock on the ressource that stores the session data. If this is not done, race conditions will destroy the data. The internal files handler gets it right. The Example #2, which reimplements this handler, gets it wrong! I don't know about any other internal save handler, like sqlite or memcached. This one is a duplicate of Bug #55624, but with better explanation and more code. :) Test script: --------------- Please see http://pastebin.com/EbqigxmY Expected result: ---------------- When running the script from http://pastebin.com/EbqigxmY the expected behaviour is that all three iframes get filled one after another, with 1 second break between each. The last response should list all three subrequests and the master request in the var_dump(). Actual result: -------------- Using the example #2 code, all iframes get filled after 1 second, and all of them only report the master request and its own subrequest in the dump. -- Edit bug report at https://bugs.php.net/bug.php?id=63278&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=63278&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=63278&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=63278&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=63278&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=63278&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=63278&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=63278&r=needscript Try newer version: https://bugs.php.net/fix.php?id=63278&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=63278&r=support Expected behavior: https://bugs.php.net/fix.php?id=63278&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=63278&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=63278&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=63278&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63278&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=63278&r=dst IIS Stability: https://bugs.php.net/fix.php?id=63278&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=63278&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=63278&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=63278&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=63278&r=mysqlcfg