PHP: Hypertext Preprocessor (original) (raw)
shm_remove
(PHP 4, PHP 5, PHP 7, PHP 8)
shm_remove — Removes shared memory from Unix systems
Description
Parameters
shm
A shared memory segment obtained from shm_attach().
Return Values
Returns [true](reserved.constants.php#constant.true) on success or [false](reserved.constants.php#constant.false) on failure.
Found A Problem?
10 years ago
`WARNING: this function WILL NOT destroy the memory segment if there are other processes attached to it, but it will return TRUE anyways!
You will have to try to access the segment again after destroying it to make sure it was relly destroyed.
`
aaron DURP segura DURP gmail DURP com ¶
18 years ago
`It appears that you must be connected to the shm segment in order to remove it.
works, while
produces "Warning: shm_remove(): The parameter is not a valid shm_identifier ..."
`
cu at ulakbim dot gov dot tr ¶
25 years ago
`Though it says shm_identifier in
int shm_remove(int shm_identifier);
and
shm_attach() returns an id that that can be used to access the System V...
a snippet like this:
shm=shmattach(shm=shm_attach(shm=shmattach(key);
// do whatever...
shm_remove($shm);
?>
produces an error like
Warning: 2(which is the value of $shm) is not a existing SysV shared memory key in /usr/cu/web/sema.php on line 44...
The documentation confused me a bit. I thought shm_remove would get the shm handle/id that returns from shm_attach, not the key given to shm_attach. So, use instead:
shm_remove($key);
which is what is intended indeed.
`