shm_has_var

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

shm_has_var — Check whether a specific entry exists

Description

shm_has_var(SysvSharedMemory $shm, int $key): bool

Checks whether a specific key exists inside a shared memory segment.

Parameters

shm

A shared memory segment obtained from shm_attach().

key

The variable key.

Return Values

Returns true if the entry exists, otherwise false

Changelog

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

See Also