Php/docs/function.shm-has-var
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shm_has_var
(PHP 5 >= 5.3.0, PHP 7)
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.
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
- shm_get_var() - Returns a variable from shared memory
- shm_put_var() - Inserts or updates a variable in shared memory
