$ _SESSION无法启动
[英]$_SESSION doesn't start
问题描述
When user is logged in nothing is displayed on the screen(Error-reporting is on). 
用户登录后，屏幕上不显示任何内容（错误报告已打开）。
It's like the $_SESSION is not true? 就像$_SESSION不正确吗？
<?php
include_once('../includes/connection.php');
if (isset($_SESSION['logged_in'])) {
?>
<html>
<head>
<title>wa</title>
<link rel="stylesheet" type="text/css" href="../assets/stylesheet.css">
</head>
<body>
<div class="container">
<a href="index.php" id="logo">CMS</a>
<br />
<ol>
<li><a href="add.php">Add Article</a></li>
<li><a href="delete.php">Delete Article</a></li>
<li><a href="logout.php">Logout</a></li>
</ol>
</div>
</body>
</html>
<?php
} else {
if (isset($_POST['username'], $_POST['password'])) {
$username = $_POST['username'];
$password = md5($_POST['password']);
if (empty($username) or empty($password)) {
$error = 'All fields are required!';
}else {
$query = $pdo->prepare("SELECT * FROM users WHERE user_name = ? AND user_password =
?");
$query->bindValue(1, $username);
$query->bindValue(2, $password);
$query->execute();
$num = $query->rowCount();
if ($num == 1) {
$_SESSION['logged_in'] = true;
header('Location: index.php');
exit();
} else{
$error = 'Incorrect details!';
}
}
}
?>
<html>
<head>
<title>Visuality dashboard</title>
<link rel="stylesheet" type="text/css" href="../assets/stylesheet.css">
</head>
<body>
<div class="container">
<a href="index.php" id="logo">CMS</a>
<br /><br />
<?php if (isset($error)) { ?>
<small style="color:#aa0000;"><?php echo $error; ?>
<br /><br />
<?php } ?>
<form action="index.php" method="post" autocomplete="off">
<input type="text" name="username" placeholder="något">
<input type="password" name="password" placeholder="något">
<input type="submit" value="Login" />
</div>
</body>
<footer>
</footer>
</html>
<?php
}
?>
3 个解决方案
解决方案1
1 已采纳 2014-12-12 12:45:56
解决方案2
0 2014-12-12 12:48:48
At line 39 md5$_POST['password']); 第39行md5$_POST['password']); you missed "(" 你错过了 ”（”
md5($_POST['password']);
解决方案3
0 2014-12-12 12:50:12
Every php file which has $_SESSION variable needs to include session_start(); 每个具有$ _SESSION变量的php文件都需要包含session_start（）; on the top of the page. 在页面顶部。
When page gets a white screen after loading, you should see php_error_log for possible syntax errors (could be missing ";"). 当页面在加载后显示白屏时，您应该看到php_error_log以获取可能的语法错误（可能缺少“;”）。 Please, review your code. 请检查您的代码。 Hope it helps you. 希望对您有帮助。
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