# shm_remove_var

(PHP 4, PHP 5, PHP 7)

shm_remove_var — Removes a variable from shared memory

### 说明

shm_remove_var ( resource `$shm_identifier` , int `$variable_key` ) : bool

Removes a variable with a given `variable_key` and frees the occupied memory.

### 参数

`shm_identifier`

  The shared memory identifier as returned by shm_attach()

`variable_key`

  The variable key.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 参见

- shm_remove() - Removes shared memory from Unix systems