session_unset
(PHP 4, PHP 5)
session_unset — Free 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
CautionNote:
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']);.
Do NOT unset the whole $_SESSION with unset($_SESSION) as this will disable the registering of session variables through the $_SESSION superglobal.
