note 16651 added to function.shmop-open

To check whether a particular shared memory segment is already created, you need to OR the "a" and "c" flags. For example (where $SystemKey is the Unix key used by the other process(es) with which you want to share this memory segment)...<BR> $shm_id = shmop_open($SystemKey, "a" | "c", 0, 0); if ($shm_id) { <it is already created> } else { <you need to create it with shmop_open using "c" only> }<BR> Using only "a" does not work (just as using only IPC_EXCL in the Unix shmget() call is meaningless). Also, use the ipcs shell command to see your shared memory segments. -- http://www.php.net/manual/en/function.shmop-open.php http://master.php.net/manage/user-notes.php?action=edit+16651 http://master.php.net/manage/user-notes.php?action=delete+16651 http://master.php.net/manage/user-notes.php?action=reject+16651