我正在尝试为我的网站开发一个博客平台，我有两个用户。我为普通用户设置了一个注释区域，然后管理员可以访问仪表板，他们可以在其中编辑和创建任何内容。但是，只有管理员有权访问该页面。不过，每次我以管理员身份登录时，它都会将我重定向回登录页面，就像我尚未登录一样。
我尝试了来自各个网站的无数其他建议，并通读了所有与我需要的问题有关的问题。谁能将我引导到可以找到有关如何设置此系统的可靠信息的位置，以便我可以登录而无需再次重定向到登录屏幕？
这是我只希望管理员进入的页面之一。
<?php include('../config.php'); ?>
<?php include(ROOT_PATH . '/admin/includes/admin_functions.php'); ?>
<?php include(ROOT_PATH . '/admin/includes/head_section.php'); ?>
<title>Admin | Dashboard</title>
<link href="includes/admin_styling.css" rel="stylesheet" type="text/css">
</head>
<body>
<div class="header">
<div class="logo">
<a href="<?php echo BASE_URL .'admin/dashboard.php' ?>">
<h1>Administrative Dashboard</h1>
</a>
</div>
<?php if (isset($_SESSION['user'])): ?>
<div class="user-info">
<span><?php echo $_SESSION['user']['username'] ?></span>
<a href="<?php echo BASE_URL . '/logout.php'; ?>" class="logout-btn">logout</a>
</div>
<?php endif ?>
</div>
<div class="container dashboard">
<div class="transbox">
<h1>Welcome</h1>
</div>
<div class="transbox">
<div class="stats">
<a href="users.php" class="first">
<br>
<span>Registered Users</span>
</a>
<a href="posts.php">
<br>
<span>Blog Posts</span>
</a>
<a>
<br> <!--WILL ADD IN SOON-->
<span>Published Comments</span>
</a>
</div>
</div>
<br><br><br>
<div class="buttons">
<a href="users.php">Add Users</a>
<a href="posts.php">Add Posts</a>
</div>
</div>
</body>
</html>
这是registration_login页面：
<?php
// variable declaration
$username = "";
$email = "";
$errors = array();
// REGISTER USER
if (isset($_POST['reg_user'])) {
// receive all input values from the form
$username = esc($_POST['username']);
$email = esc($_POST['email']);
$password_1 = esc($_POST['password_1']);
$password_2 = esc($_POST['password_2']);
// form validation: ensure that the form is correctly filled
if (empty($username)) { array_push($errors, "Uhmm...We gonna need your username"); }
if (empty($email)) { array_push($errors, "Oops.. Email is missing"); }
if (empty($password_1)) { array_push($errors, "uh-oh you forgot the password"); }
if ($password_1 != $password_2) { array_push($errors, "The two passwords do not match");}
// Ensure that no user is registered twice.
// the email and usernames should be unique
$user_check_query = "SELECT * FROM users WHERE username='$username'
OR email='$email' LIMIT 1";
$result = mysqli_query($conn, $user_check_query);
$user = mysqli_fetch_assoc($result);
if ($user) { // if user exists
if ($user['username'] === $username) {
array_push($errors, "Username already exists");
}
if ($user['email'] === $email) {
array_push($errors, "Email already exists");
}
}
// register user if there are no errors in the form
if (count($errors) == 0) {
$password = md5($password_1);//encrypt the password before saving in the database
$query = "INSERT INTO users (username, email, password, created_at, updated_at)
VALUES('$username', '$email', '$password', now(), now())";
mysqli_query($conn, $query);
// get id of created user
$reg_user_id = mysqli_insert_id($conn);
// put logged in user into session array
$_SESSION['user'] = getUserById($reg_user_id);
// if user is admin, redirect to admin area
if ( in_array($_SESSION['user']['role'], ["Admin", "Author"])) {
$_SESSION['message'] = "You are now logged in";
// redirect to admin area
header('location: ' . BASE_URL . 'admin/dashboard.php');
exit(0);
} else {
$_SESSION['message'] = "You are now logged in";
// redirect to public area
header('location: index.php');
exit(0);
}
}
}
// LOG USER IN
if (isset($_POST['login_btn'])) {
$username = esc($_POST['username']);
$password = esc($_POST['password']);
if (empty($username)) { array_push($errors, "Username required"); }
if (empty($password)) { array_push($errors, "Password required"); }
if (empty($errors)) {
$password = md5($password); // encrypt password
$sql = "SELECT * FROM users WHERE username='$username' and password='$password' LIMIT 1";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// get id of created user
$reg_user_id = mysqli_fetch_assoc($result)['id'];
// put logged in user into session array
$_SESSION['user'] = getUserById($reg_user_id);
// if user is admin, redirect to admin area
if ( in_array($_SESSION['user']['role'], ["Admin", "Author"])) {
$_SESSION['message'] = "You are now logged in";
// redirect to admin area
header('location: ' . BASE_URL . '/admin/dashboard.php');
exit(0);
} else {
$_SESSION['message'] = "You are now logged in";
// redirect to public area
header('location: index.php');
exit(0);
}
} else {
array_push($errors, 'Wrong credentials');
}
}
}
// escape value from form
function esc(String $value)
{
// bring the global db connect object into function
global $conn;
$val = trim($value); // remove empty space sorrounding string
$val = mysqli_real_escape_string($conn, $value);
return $val;
}
// Get user info from user id
function getUserById($id)
{
global $conn;
$sql = "SELECT * FROM users WHERE id=$id LIMIT 1";
$result = mysqli_query($conn, $sql);
$user = mysqli_fetch_assoc($result);
// returns user in an array format:
// ['id'=>1 'username' => 'Awa', 'email'=>'a@a.com', 'password'=> 'mypass']
return $user;
}
?>
那么我如何以及在哪里放置这段代码？我对会议有一定的了解，但是我没有任何尝试。尝试以管理员身份登录时，输入的所有内容都会将我重定向回登录页面。