网站代码如下。登录无法通过我所做的事情进行身份验证。首先，如果没有登录，它将按预期重定向到登录页面。然后，在我清楚地正确提供登录详细信息后，它不会将我重定向到我想要的网站。相反，它将保留在登录页面上。请帮帮我......
<!--This is the page that I want to redirect after successful login-->
<?php
session_start();
if($_SESSION['loggedIn'])
{
header('Location: restaurant.php');
}
else
{
header('Location: login.php');
}
?>
<html lang="en">
<head>
<title>Welcome to Foodline</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<link rel="stylesheet" href="bootstrap/dist/css/bootstrap.min.css">
<link href="css/simple-sidebar.css" rel="stylesheet">
<script src="bootstrap/js/jquery.min.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>
<script type="text/javascript" src="js.js"></script>
<script type="text/javascript" src="jquery.js"></script>
<style>
/* Remove the jumbotron's default bottom margin */
.jumbotron {
margin-bottom: 0;
}
/* Add a gray background color and some padding to the footer */
footer {
background-color: #f2f2f2;
padding: 25px;
}
</style>
</head>
<body>
<div class="jumbotron">
<div class="container text-center">
<h1><font face="Analecta">FOODLINE</font></h1>
<p>We provide the best service for our costumers</p>
</div>
</div>
<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand"><font face="Analecta" color="white">>Restaurants<</font></a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li>
<a href="foodline.php">Hamro Didi (HD)</a>
</li>
<li>
<a href="#">HK</a>
</li>
<li>
<a href="#">Junu Hotel</a>
</li>
<li>
<a href="#">Junction Cafe</a>
</li>
<li>
<a href="#">Laxmi Hotel</a>
</li>
</ul>
</div>
</div>
</nav>
<footer class="container-fluid text-center">
<p>Foodline Official Website ©</p>
<p align="center">Logged in as: <div id="username" align="center"> <span class="glyphicon glyphicon-log-in"></span><?php
if(isset($_GET['id'])){
echo ' '.$_GET['id'];
}
else {
echo '(write) a 404 page';
}
?>
</div>
</p>
</footer>
</div>
<!--This is login.php-->
<?php
//session_start();
include("connection.php");
$msg='';
if($_SERVER["REQUEST_METHOD"] == "POST")
{
// username and password sent from form
$username = $_POST['username'];
$password = $_POST['password'];
// To protect MySQL injection
$username = stripslashes($username);
$password = stripslashes($password);
$username = mysql_real_escape_string($username);
$password = mysql_real_escape_string($password);
//Input Validations
if($username == '') {
$_SESSION["login_user"] = $username; $msg = "Username missing";
header("location: login.php?msg=$msg");
}
if($password == '') {
$msg = "Password missing";
header("location: login.php?msg=$msg");
}
//Create query
$qry="SELECT * FROM user WHERE user_name='$username' AND user_password='$password'";
$result =mysql_query($qry)or die(mysql_error());
$output=mysql_fetch_assoc($result);
//Check whether the query was successful or not
if(!empty($output)) {
//Login Successful
$_SESSION['name']= $username;
$_SESSION['loggedIn'] = true;
header("location:restaurant.php?id=$username");
}
else {
//Login failed
$msg= "user name and password not found";
header("location:login.php?msg=$msg");
}
}
?>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="bootstrap/dist/css/bootstrap.min.css">
<script src="bootstrap/js/jquery.min.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>
<style>
.jumbotron {
margin-bottom: 0;
}
</style>
</head>
<body>
<div class="jumbotron">
<div class="container text-center">
<h1><font face="Analecta">FOODLINE</font></h1>
<p>We provide the best service for our costumers</p>
</div>
</div>
<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="index.php">Logo</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li class="active"><a href="index.php">Home</a></li>
<li><a href="restaurant.php">Restaurants</a></li>
<li><a href="contact-form/index.html">Contact</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="register.php"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
<li><a href="login.php"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
</ul>
</div>
</div>
</nav>
<div class="container">
<h2><font face="Analecta">>Login from here<</font></h2>
<form role="form" name="login" action="login.php" method="post" accept-charset="utf-8">
<div class="form-group">
<label for="username">Username:</label>
<input type="text" class="form-control" name="username" placeholder="Enter username" required>
</div>
<div class="form-group">
<label for="password">Password:</label>
<input type="password" class="form-control" name="password" placeholder="Enter password" required>
</div>
<div class="checkbox">
<label><input type="checkbox"> Remember me</label>
</div>
<button type="submit" class="btn btn-default" value="login">Submit</button>
<br>
<br>
<?php
$msg = (isset($_GET['msg']) ? $_GET['msg'] : null); //GET the message
if($msg!='') echo '<p>'.$msg.'</p>'; //If message is set echo it
?>
</form>
<p>Not a user yet? Sign up <a href="register.php">here</a></p>
</div>
<footer class="container-fluid text-center">
<p>Foodline Official Website ©</p>
<p>Get deals:
<a href="register.php"><span class="glyphicon glyphicon-menu-right"></span>SignUp</a>
</p>
</footer>
</body>
</html>
答案 0 :(得分：2)
取消注释：
//session_start();
从login.php的第5行开始，改为：
if(! $_SESSION['loggedIn']) {
header('Location: login.php');
}
在restaurant.php。