= 5.3.0, PHP 7, PHP 8)shm_has_var — Check whether a specific entry exists說明shm_has_var(SysvSharedMemory $shm, int $key): boolChecks">

shm_has_var

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

shm_has_var — Check whether a specific entry exists

說明

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

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

參數(shù)

shm

A shared memory segment obtained from shm_attach().

key

The variable key.

返回值

Returns true if the entry exists, otherwise false

更新日志

版本 說明
8.0.0 shm expects a SysvSharedMemory instance now; previously, a resource was expected.

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