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我嘗試在登錄表單中單擊提交按鈕後使用header("location: profile.php")重定向頁面，但該頁面不會重定向。用戶名和密碼只是在某處提交。重定向標題不會重定向到目標頁面
這是我的主網頁：
<?php
include ($_SERVER["DOCUMENT_ROOT"]."/example/login.php");
if(isset($_SESSION['login_user'])){
header("location: profile.php");
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>welcome to noteshare</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/bootstrap.css">
<link rel="stylesheet" href="css/bootstrap-theme.css">
<link rel="stylesheet" href="css/bootstrap-theme.min.css">
<link rel="stylesheet" href="css/jquery_popup.css" />
<script src="js/bootstrap.min.js"></script>
<script src="js/bootstrap.js"></script>
<script src="js/npm.js"></script>
<script src="js/jquery_popup.js"></script>
<script type="text/javascript" src="js/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="js/jquery.leanModal.min.js"></script>
<style>
/* Remove the navbar's default margin-bottom and rounded borders */
.navbar {
margin-bottom: 0;
border-radius: 0;
}
/* Set height of the grid so .sidenav can be 100% (adjust as needed) */
.row.content {height: 450px}
/* Set gray background color and 100% height */
.sidenav {
padding-top: 20px;
background-color: #f1f1f1;
height: 100%;
}
/* Set black background color, white text and some padding */
footer {
background-color: #555;
color: white;
padding: 15px;
}
/* On small screens, set height to 'auto' for sidenav and grid */
@media screen and (max-width: 767px) {
.sidenav {
height: auto;
padding: 15px;
}
.row.content {height:auto;}
}</style>
</head>
<!-- Body Starts Here -->
<body id="body">
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Logo</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Projects</a></li>
<li><a href="#">Contact</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="#" id="popup" onclick="div_show()"><span class="glyphicon glyphicon-log-in"></span>Login</a></li>
</ul>
</div>
</div>
</nav>
<div class="container-fluid text-center">
<div class="row content">
<div class="col-sm-2 sidenav">
<p><a href="#">Link</a></p>
<p><a href="#">Link</a></p>
<p><a href="#">Link</a></p>
</div>
<div class="col-sm-8 text-left">
<h1>noteshare</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididuntut labore et dolore magna aliqua. Ut enim ad minim veniam,
quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Excepteur sint occaecat cupidatat non proident,sunt in culpa qui
officia deserunt mollit anim id est laborum consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
<hr>
<img src="images/girl_studying.jpg">
</div>
<div class="col-sm-2 sidenav">
<div class="well">
<p>ADS</p>
</div>
<div class="well">
<p>ADS</p>
</div>
</div>
</div>
</div>
<footer class="container-fluid text-center">
<p>Footer Text</p>
</footer>
<div id="abc">
<!-- Popup Div Starts Here -->
<div id="popuplogin">
<!-- Contact Us Form -->
<form action="" id="form" method="post" name="form">
<img id="close" src="images/cross.png" onclick ="div_hide()">
<h2>login form</h2>
<hr id="line">
<input id="username" name="username" placeholder="username" type="text" required>
<input id="password" name="password" placeholder="password" type="password" required>
<input name="submit" type="submit" value=" Login ">
<span><?php echo $error; ?></span>
<p> <a href="register.php">click here to register first</a></p>
</form>
</div>
<!-- Popup Div Ends Here -->
</div>
<!-- Display Popup Button -->
</body>
<!-- Body Ends Here -->
</html>
這裏是包含header()函數調用的login.php頁面：
<?php
session_start(); // Starting Session
$error=""; // Variable To Store Error Message
if (isset($_POST['submit'])) {
if (empty($_POST['username']) || empty($_POST['password'])) {
$error = "Username or Password is invalid";
}
else
{
// Define $username and $password
$username=$_POST['username'];
$password=$_POST['password'];
// Establishing Connection with Server by passing server_name, user_id and password as a parameter
$server="localhost";
$username="root";
$password="";
$database="noteshare";
$conn = new mysqli($server, $username, $password, $database);
// To protect MySQL injection for Security purpose
$username = stripslashes($username);
$password = stripslashes($password);
//$username = mysql_real_escape_string($username);
//$password = mysql_real_escape_string($password);
// Selecting Database
//$db = mysqli_select_db("noteshare", $conn);
// SQL query to fetch information of registerd users and finds user match.
$qry="select * from signin where password='$password' AND username='$username'";
$query = mysqli_query($conn,$qry);
$rows = mysqli_fetch_row($query);
if ($rows == 1) {
$_SESSION['login_user']=$username; // Initializing Session
header("Location:http://localhost.com/profile.php", true, 301); exit;// Redirecting To Other Page
} else {
$error = "Username or Password is invalid";
}
mysqli_close($conn); // Closing Connection
}
}
?>
我認爲條件if（$ row == 1）計算結果爲false。嘗試if（$ row） –