PHP 手册
Session 函数

session_unset

(PHP 4, PHP 5)

session_unsetFree all session variables

说明

void session_unset ( void )

The session_unset() function frees all session variables currently registered.

返回值

没有返回值。

注释

Note:

If $_SESSION (or $HTTP_SESSION_VARS for PHP 4.0.6 or less) is used, use unset() to unregister a session variable, i.e. unset ($_SESSION['varname']);.

Caution

Do NOT unset the whole $_SESSION with unset($_SESSION) as this will disable the registering of session variables through the $_SESSION superglobal.


Session 函数
PHP 手册