(PHP 5 >= 5.3.0, PHP 7, PHP 8)
shm_has_var — Check whether a specific entry exists
$shm
, int $key
) : boolChecks whether a specific key exists inside a shared memory segment.
Returns true if the entry exists, otherwise false
| 版本 | 说明 |
|---|---|
| 8.0.0 |
shm expects a SysvSharedMemory
instance now; previously, a resource was expected.
|