这就是我所拥有的 headers.php 无论如何它应该是我的导航栏。这是问题所在，当我以会员身份以用户身份登录时，整个标题都不会出现。但是当我用管理员登录时，导航会“神奇地”出来！
<?php
if(!isset($_SESSION['sRole'])){
?>
<div id="header">
<div id="fb-root"></div>
<div id ="inthebox">
<a href="login.php" class="link"><b>LOGIN</b></a>|
<a href="register.php" class="link"><b>REGISTER</b></a>
</div>
<div id ="outthebox">
<a href="index.php" class="link">HOME</a>|
<a href="bookshelf.php" class="link">BOOKSHELF</a>|
<a href="shoppingcart.php" class="link">SHOPPING CART</a>|
<a href="about.php" class="link">ABOUT</a>|
<a href="logout.php" class="link">ABOUT</a>|
</div>
</div>
<?php
}
else{
if($_SESSION['sRole'] == "member"){
?>
<div id="header">
<div id ="inthebox">
<a href="logout.php" class="link"><b>LOGOUT</b></a>
</div>
<div id ="outthebox">
<a href="index.php" class="link">HOME</a>|
<a href="bookshelf.php" class="link">BOOKSHELF</a>|
<a href="shoppingcart.php" class="link">SHOPPING CART</a>|
<a href="about.php" class="link">ABOUT</a>|
<a href="updateProfile.php" class="link">PROFILE</a>
<?php
echo("You have Login as :" . $_SESSION['sUsername']);
?>
</div>
</div>
<?php
}else{
if($_SESSION['sRole']=="admin"){
?>
<div id="header">
<div id ="inthebox">
<a href="logout.php" class="link"><b>LOGOUT</b></a>
</div>
<div id="outthebox">
<a href="index.php" class="link">HOME</a>|
<a href="bookshelf.php" class="link">BOOKSHELF</a>|
<a href="shoppingcart.php" class="link">SHOPPING CART</a>|
<a href="about.php" class="link">ABOUT</a>|
<a href="account.php" class="link">Manage Account</a>|
<a href="managebook.php" class="link">Manage Books</a>|
<a href="manageOrder.php" class="link">Manage Orders</a>|
<?php
echo("You have Login as :" . $_SESSION['sUsername']);
?>
</div>
</div>
<?php
}
}
}
?>
这是我的 doLogin.php 页面，也许它可以帮助这里的任何人解决这个问题。我将 id、用户名、名字和姓氏存储到会话中。里面有 alr 。我进去时的网站hor是没有错误的。没有html代码错误或任何东西。只是它没有出现。然而，导航链接下方的文字仍然会出现。
<?php
//connect to database
include ('dbfunction.php');
if (!isset($_POST['Login'])) {
if (isset($_POST['username'])) {
//retrieve form data
$username = $_POST['username'];
$password = $_POST['password'];
$query = "SELECT * FROM users WHERE username='" . $username . "'AND password = '" . $password . "'";
$result = mysql_query($query) or die('The error :' . mysql_error());
$num_rows =mysql_num_rows($result);
if($num_rows == 0){
header('Location:login.php');
exit();
}
//if record is found, store id and username into session
else{
$row = mysql_fetch_array($result);
$_SESSION['sUsername'] = $row['username'];
$_SESSION['sRole'] = $row['role'];
$_SESSION['sFirst_name'] = $row['first_name'];
$_SESSION['sLast_name'] = $row['last_name'];
header('location:successful_login.php');//redirect to this page
exit();
}
}
else {
}
} else {
header('Location:successful_login.php');
exit();
}
mysql_close();
?>