你的登陆验证用的cookie还是session?
session用session_unset(); session_destroy();
cookie 用setcookie('用户', '');..................
session用session_unset(); session_destroy();
cookie 用setcookie('用户', '');..................
调试欢乐多
if( empty($_SESSION['username'] ) || !isset( empty($_SESSION['username'] )){
header("location: xxx.php");
}
else
...在点击登出后。
session_unregister('username');