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SESAM shm_remove_var

Last updated: Fri, 26 Jan 2007

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# shm_remove

(PHP 3 >= 3.0.6, PHP 4, PHP 5)

shm_remove -- Removes shared memory from Unix systems

## Description

bool shm_remove ( int shm_identifier )

shm_remove() removes the shared memory `shm_identifier`. All data will be destroyed.

See also shm_remove_var().

add a note User Contributed Notes
shm_remove
aaron DURP segura DURP gmail DURP com
19-Aug-2006 04:55
`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 ..."`
cu at ulakbim dot gov dot tr
29-Dec-1999 08:30
`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.`
add a note
SESAM shm_remove_var

Last updated: Fri, 26 Jan 2007
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