当我的用户登录时，标题对我的管理页面不起作用 - header is not working to my manage page when my users with privlieges log in

header is not working to my manage page when my users with privlieges log in

这是我的索引.php页面的代码。我的标题不起作用，因为当我的用户访问它时，不会将我重定向到管理.php页面。我的管理.php中的标题也不起作用。我很乐意感谢任何人的帮助。我尝试再次重新输入整个内容，也粘贴我的教师代码，看看是否可能是我犯了错误但仍然不起作用，我尝试了所有:(

<?php
require_once("../req_globals.php");
$error = false;
$message = '';
if(isset($_POST['username']) && isset($_POST['password']))
{
    $username = $_POST['username'];
    $password = $_POST['password'];
    // echo $username;
    if(empty($username))
    { 
        $error = true;
        $message = $message . "<p>You forgot your username.</p>";
    }
    if (empty($password)) 
    {
        $error = true;
        $message = $message . "<p>Do you even password bro?</p>";
    }
    if($error == false)
    {
        // echo "working";
        $user = mysqli_query($con, "SELECT * FROM users 
                        WHERE username = '" . $username . "' 
                        AND password = '" . $password . "' 
                        LIMIT 1");
        $userCount = mysqli_num_rows($user);
        $userWorker = mysqli_fetch_assoc($user);
        if($userCount < 1) 
        {
            $error = true;
            $message = $message . "<p>You don't exist...</p>";
            echo $userCount;
        }
        else 
        {
            if ($userWorker["privs"] == "No") 
            {
                $error = true;
                $message = $message . "<p>YOU SHALL NOT PASS!!!</p>";
            }
            if ($error == false) 
            {
                session_start();
                $_SESSION['firstname'] = $userWorker['firstname'];
                $_SESSION['privs'] = $userWorker['privs'];
                header('Location:ad_manage.php?login=success');
            }
        }
    }

}
?>

header('Location:ad_manage.php?login=success');
exit();

在声明标头之前，您是否输出了任何内容？如果是这样，它将无法工作，因为标头已经发送。如果没有，请尝试以下操作：

$root = getenv('HTTP_HOST');
header("Location: http://$root/ad_manage.php?login=success");
exit();