# shm_get_var

(PHP 4, PHP 5, PHP 7)

shm_get_var — Returns a variable from shared memory

### 说明

shm_get_var ( resource `$shm_identifier` , int `$variable_key` ) : mixed

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

### 参数

`shm_identifier`

  Shared memory segment, obtained from shm_attach().

`variable_key`

  The variable key.

### 返回值

Returns the variable with the given key.

### 参见

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