Semaphore 函数

shm_has_var

(PHP 5 >= 5.3.0)

shm_has_var — Check whether a specific entry exists

说明

bool shm_has_var ( resource $shm_identifier , int $variable_key )

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

参数

shm_identifier: Shared memory segment, obtained from shm_attach().
variable_key: The variable key.

返回值

Returns TRUE if the entry exists, otherwise FALSE

参见

shm_get_var() - Returns a variable from shared memory
shm_put_var() - Inserts or updates a variable in shared memory

Semaphore 函数