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    shm_has_var

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

    shm_has_var — Check whether a specific entry exists

    说明

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

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

    参数

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

    参见

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