On Mon, May 16, 2011 at 3:41 PM, Reindl Harald <h.rei...@thelounge.net>wrote:
> There is no function needed if you use > http://php.net/manual/de/function.session-write-close.php > like others do since ten years :-) > > if you know that you no longer write to the session use it > this does not mean $_SESSION is lost > it means only that changes to $_SESSIOn are not available for other > requests > > Am 16.05.2011 15:37, schrieb Alain Williams: > > I am working on some AJAX callbacks. These need to open the session, get > hold of stuff in $_SESSION > > and that is it ... they won't be changing the session data. The trouble > is that because the > > session file is locked the Asynchronicity of AJAX is reduced a bit, > especially if some of the > > server side calls need a lot of work. > > > > May I suggest: > > > > session_disconnect(); > > > > This would, in effect, close the session file but leave $_SESSION. This > would be easy to implement, > > just call the second callback to session_set_save_handler(). > > > > This is NOT quite the same as a session_end() function since that would > presumably write the > > (changed) contents of $_SESSION back to where ever. With > session_disconnect() any changes made > > to $_SESSION would be lost regardless of them being made before or after > the call to session_disconnect(). > > > > Another way of doing this would be to add an optional boolean argument to > session_start() which > > would load $_SESSION and then disconnect. This is more intrusive in that > changes to any user > > open functions (of session_set_save_handler()) would be needed. It might > be a tiny bit faster > > or neater. > > > > > > I do not know how much of a speed improvement this would make to what > sort of AJAX applications. > > on a related note, could we fix http://bugs.php.net/bug.php?id=38104 ? with that in mind, somebody could close and reopen the session as necessary(with releasing and acquiring the lock properly). personally I always went with the lock the whole session until the request is complate, used the session_write_close to release the lock on the session before the request ended, but never needed to re-open it after I closed. but I can see why is the current behaviour is a PITA. Tyrael
