我试图让我的导航栏在登录时发生变化，以便注册和登录变成用户的用户名我有我的代码，但我不明白为什么它不起作用......
登录.php
<?php
include 'header.php';
include 'ini.php';
$username = "";
$password = "";
if(isset($_POST['login'])) {
if ($userQuery->execute()) {
while ($row = $userQuery->fetch()) {
$username = $_POST["username"];
$password = $_POST["password"];
$userQuery = $pdo->prepare("SELECT * FROM users WHERE username LIKE :username");
$addUserQuery->bindParam(":username", $username);
if (
username == $row['User_Username'] && password == $row['User_Password']
) {
$_SESSION['loggedin'] = "true";
$_SESSION['username'] = $username;
}
}
}
}
?>
<div class="container">
<div class="row">
<div class='col-md-3'></div>
<div class="col-md-6">
<div class="login-box well">
<form action="index.php" id="login" name="login">
<legend>Sign In</legend>
<div class="form-group">
<label for="username">Username</label>
<input value='' id="username" placeholder="Username" type="text" class="form-control" />
</div>
<div class="form-group">
<label for="password">Password</label>
<input id="password" value='' placeholder="Password" type="text" class="form-control" />
</div>
<div class="input-group">
<div class="checkbox">
<label>
<input id="login-remember" type="checkbox" name="remember" value="1"> Remember me
</label>
</div>
</div>
<div class="form-group">
<input type="submit" id="login" name="login" class="btn btn-default btn-login-submit btn-block m-t-md" value="Login" />
</div>
<span class='text-center'><a href="/resetting/request" class="text-sm">Forgot Password?</a></span>
<div class="form-group">
<p class="text-center m-t-xs text-sm">Do not have an account?</p>
<a href="register.php" class="btn btn-default btn-block m-t-md">Create an account</a>
</div>
</form>
</div>
</div>
<div class='col-md-3'></div>
</div>
</div>
<?php
include 'footer.php';
?>
标题.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Web Development company providing HTML, CSS, PHP and JS in your local area">
<meta name="author" content="Kieran Brownfield">
<title>Web Development Penzance - Providing Web Development in your area</title>
<!-- Bootstrap Core CSS -->
<link href="css/bootstrap.min.css" rel="stylesheet"/>
<link href="css/main.css" rel="stylesheet"/>
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<header class="header">Web Development Penzance</header>
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-static-top" role="navigation">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li>
<a href="index.php">Home</a>
</li>
<li>
<a href="#">About</a>
</li>
<li>
<a href="#">Contact</a>
</li>
<li>
<a href="#">Gallery</a>
</li>
<li>
<a href="#">Meet the Team</a>
</li>
</ul>
<ul class="nav navbar-nav pull-right">
<?php
if (isset($_SESSION['loggedin'])) { ?>
<li><p class="navbar-text navbar-right">Signed in as: <?php echo $_SESSION["username"] ?> </p></li>
<li><a href="#">Logout</a></li>
<li><a href="#">Account</a></li>
<?php } else { ?>
<li><a href="register.php">Register</a></li>
<li><a href="signin.php">Login</a></li>
<?php } ?>
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
最佳答案
为了跨页面加载访问 $_SESSION 变量，将 session_start() 添加到这两个文件的顶部。 Docs.
关于PHP PDO 尝试在登录时更改导航栏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36460042/