# session_unregister

(PHP 4, PHP 5 < 5.4.0)

session_unregister — Unregister a global variable from the current session

### 说明

session_unregister ( string `$name` ) : bool

session_unregister() unregisters the global variable named `name` from the current session.

Warning

本函数已自 PHP 5.3.0 起废弃并将自 PHP 5.4.0 起移除。

### 参数

`name`

  The variable name.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 注释

> Note:

> If $_SESSION is used, use unset() to unregister a session variable. Do not unset() $_SESSION itself as this will disable the special function of the $_SESSION superglobal.

Caution

This function does not unset the corresponding global variable for `name`, it only prevents the variable from being saved as part of the session. You must call unset() to remove the corresponding global variable.

Caution

If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered() and session_unregister().