Php/docs/function.shm-get-var

• PHP Manual
• Semaphore 函数
• Returns a variable from shared memory

shm_get_var

(PHP 4, PHP 5, PHP 7)

shm_get_var — Returns a variable from shared memory

说明

shm_get_var ( SysvSharedMemory $shm , int $key ) : mixed

shm_get_var() returns the variable with a given key, in the given shared memory segment. The variable is still present in the shared memory.

参数

shm

A shared memory segment obtained from shm_attach().

key

The variable key.

返回值

Returns the variable with the given key.

更新日志

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

参见

• shm_has_var() - Check whether a specific entry exists
• shm_put_var() - Inserts or updates a variable in shared memory