PhpMyAdminSSO注销

我正在使用PhpMyAdmin和自定义单点登录(SSO)脚本直接登录界面.由我自己的系统给出一个唯一的登录令牌,PHP调用SSO脚本.此脚本在我的系统中查找唯一ID,以便检索MySQL用户名和密码,并将其返回给PhpMyAdmin.

到目前为止这是有效的,但我的下一个目标是在一定程度的不活动后自动注销.如果没有SSO,删除我的浏览器COOKIE并单击任何链接,我会进入登录页面,并显示消息»您的会话已过期.请再次登录.«.但是,我无法从我的SSO脚本中重现此行为.

这是我的SSO脚本:

 SESSION_TIMEOUT) {
        $sessiOnExpired= true;
    } else {
        $sessiOnExpired= false;
    }

    if (isset($query['old_usr'])) {
        /* logout and back to index page */
        unset($_SESSION['ssoLastActivity']);
        unset($_SESSION['ssoUser']);
        unset($_SESSION['ssoPassword']);
        header('Location: index.php');
        exit;
    }

    if ($sessionExpired) {
        unset($_SESSION['ssoLastActivity']);
        unset($_SESSION['ssoUser']);
        unset($_SESSION['ssoPassword']);

        /******** POINT OF QUESTION ********/
        /* I'm trying to give the same response as if the COOKIEs were deleted.
           I land on the login page as desired, however I'm missing the session
           timeout message. */
        header('Content-Type: application/json');
        echo json_encode(['redirect_flag' => '1', 'success' => false, 'error' => '']);
        exit;
        /***********************************/
    }

    /* update session activity timestamp */
    $_SESSION['ssoLastActivity'] = time();

    if (!empty($_SESSION['ssoUser']) && !empty($_SESSION['ssoPassword'])) {
        /* already logged in */
        return [
            $_SESSION['ssoUser'],
            $_SESSION['ssoPassword'],
        ];
    }

    /* retrieve MySQL login credentials here and store them in $user and $password */

    /* $user = ...; $password = ...; */

    return [
        $user,
        $password,
    ];
}

 array('auth_type' => 'signon', ..., 'SignonScript' => '/usr/share/phpMyAdmin/sso.php', 'SignonURL' => 'index.php?server=1'),
    2 => array('auth_type' => 'COOKIE', ...)
);