php[world] in Washington, D.C.

shm_remove

(PHP 4, PHP 5)

shm_removeElimina la memoria compartida de sistemas Unix

Descripción

bool shm_remove ( resource $shm_identifier )

shm_remove() elimina el identificador de memoria compartida shm_identifier. Toda la información será destruida.

Parámetros

shm_identifier

El identificador de memoria compartida devuelto por shm_attach()

Valores devueltos

Devuelve TRUE en caso de éxito o FALSE en caso de error.

Ver también

add a note add a note

User Contributed Notes 3 notes

up
0
HansRich
2 months 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.
up
0
aaron DURP segura DURP gmail DURP com
8 years ago
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 ..."
up
0
cu at ulakbim dot gov dot tr
14 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:
<?php
  $key
= 1234;
 
$shm=shm_attach($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.
To Top