thinkphp后台登陆自动监测方法_initialize

 public function _initialize()
    {
       C('DEFAULT_THEME', 'admin');
        header("Content-Type:text/html; charset=utf-8");
        if (ACTION_NAME != 'login' && ACTION_NAME != 'logout' && ACTION_NAME != 'verifycode') {
            if (! session('?admin') || ! session('?brower')) {
                header("Location: " . U('login'));
                exit();
            } elseif (session('brower') != md5($_SERVER['HTTP_USER_AGENT'] . $_SERVER['REMOTE_ADDR'])) {
                redirect(U('logout', 3, '检测到异常，请您重新登录！正在跳转...'));
            }
        }
    }

进行后台的控制器的每一个操作都会先执行initialize，如有异常就退出。