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

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User Contributed Notes 2 notes

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0
aaron DURP segura DURP gmail DURP com
7 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 ..."
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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.
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