Nu-Coder Manual

PhpExpress Manual

PHP Joomla
Development

shm_put_var	shm_remove_var

Semaphore Functions	Last updated: Mon, 26 Oct 2026

shm_remove

(PHP 4, PHP 5, PHP 7, PHP 8)

shm_remove — Removes shared memory from Unix systems

Description

function shm_remove(SysvSharedMemory $shm): bool

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

Parameters

shm: A shared memory segment obtained from shm_attach().

Return Values

Returns true on success or false on failure.

Errors/Exceptions

Throws an Error if shm has already been detached with shm_detach().

Changelog

Version	Description
8.0.0	`shm` expects a SysvSharedMemory instance now; previously, a resource was expected.

See Also

shm_remove_var() - Removes a variable from shared memory

shm_put_var	shm_remove_var

Semaphore Functions	Last updated: Mon, 26 Oct 2026