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shm_has_var

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

shm_has_varCheck 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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