It appears that you must be connected to the shm segment in order to remove it.
<?php
shm_remove($shm);
shm_detach($shm);
?>
works, while
<?php
shm_detach($shm);
shm_remove($shm);
?>
produces "Warning: shm_remove(): The parameter is not a valid shm_identifier ..."
shm_remove
(PHP 4, PHP 5)
shm_remove — Unix システムから共有メモリを削除する
説明
bool shm_remove ( int $shm_identifier )shm_remove() は、共有メモリ shm_identifier を削除します。 全てのデータは破棄されます。
shm_remove_var() も参照ください。
shm_remove
aaron DURP segura DURP gmail DURP com
20-Aug-2006 08:55
20-Aug-2006 08:55
cu at ulakbim dot gov dot tr
30-Dec-1999 01:30
30-Dec-1999 01:30
Though it says **shm_identifier** in
<PRE>
int shm_remove(int shm_identifier);
</PRE>
and
<PRE>
shm_attach() returns an **id** that that can be used to access the System V...
</PRE>
a snippet like this:
<PRE>
$key = 1234;
$shm=shm_attach($key);
// do whatever...
shm_remove($shm);
</PRE>
produces an error like
Warning: 2(which is the value of $shm) is not a existing SysV shared memory key in /usr/cu/web/sema.php on line 44...
The documentation confused me a bit. I thought shm_remove would get the shm handle/id that returns from shm_attach, not the key given to shm_attach. So, use instead:
<PRE>
shm_remove($key);
</PRE>
which is what is intended indeed.