shm_has_var
PHP function
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(PHP 5 >= 5.3.0, PHP 7, PHP 8)
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
shmA shared memory segment obtained from
shm_attach().keyThe 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. |