// 在 config.php 中添加以下函数
function is_banned() {
    if (!is_login()) return false;
    
    $users = get_data(USER_FILE);
    $uid = $_SESSION['user_id'];
    
    if (isset($users[$uid])) {
        $status = $users[$uid]['status'] ?? USER_STATUS_ACTIVE;
        return $status == USER_STATUS_BANNED;
    }
    
    return false;
}

function check_user_status() {
    if (is_banned()) {
        // 清除登录状态
        unset($_SESSION['user_id']);
        
        // 重定向到登录页面并显示封禁信息
        $_SESSION['banned_message'] = '您的账号已被封禁，请联系管理员';
        header('Location: login.php');
        exit;
    }
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function check_user_status() in /www/wwwroot/aej/index.php:4
Stack trace:
#0 {main}
  thrown in <b>/www/wwwroot/aej/index.php</b> on line <b>4</b><br />