Question

设计用户成员资格的另一种尝试。必须成功登录，才能在数据库中查找数据。但是在我的索引文件中，登录后，应检查我是否已登录并显示指向我帐户的链接，而不是注册和登录。这是代码：

<?php
session_start(); // Must start session first thing
// See if they are a logged in member by checking Session data
$toplinks = "";
if (isset($_SESSION['id'])) {
// Put stored session variables into local php variable
$userid = $_SESSION['id'];
$username = $_SESSION['username'];
$toplinks = '<a href="member_profile.php?id=' . $userid . '">' . $username . '</a>           &bull; 
<a href="member_account.php">Account</a> &bull; 
<a href="logout.php">Log Out</a>';
} else {
$toplinks = '<a href="join_form.php">Register</a> &bull; <a     href="login.php">Login</a>';
}
?>

这是登录表单代码，我认为问题是因为它没有存储我的会话ID：

<?php
if ($_POST['email']) {
//Connect to the database through our include 
include_once "connect_to_mysql.php";
$email = stripslashes($_POST['email']);
$email = strip_tags($email);
$email = mysql_real_escape_string($email);
$password = preg_replace("[^A-Za-z0-9]", "", $_POST['password']); 
// filter everything but numbers and letters
$password = md5($password);
// Make query and then register all database data that -
// cannot be changed by member into SESSION variables.
// Data that you want member to be able to change -
// should never be set into a SESSION variable.
$sql = mysql_query("SELECT * FROM users WHERE email='$email' AND password=
'$password'AND emailactivated='1'"); 
$login_check = mysql_num_rows($sql);
if($login_check > 0){ 
while($row = mysql_fetch_assoc($sql)){ 
    // Get member ID into a session variable
    $userid = $row["id"];   
    $_SESSION['id'] = $userid;
    // Get member username into a session variable
    $username = $row["username"];
    $_SESSION['username'] = $username;
    // Update last_log_date field for this member now
    mysql_query("UPDATE users SET lastlogin=now() WHERE id='$userid'"); 
    // Print success message here if all went well then exit the script
    header("location: member_profile.php?id=$userid"); 
    exit();
} // close while
} else {
// Print login failure message to the user and link them back to your login page
print '<br /><br /><font color="#FF0000">No match in our records, try again 
</font>  <br/>
<br /><a href="login.php">Click here</a> to go back to the login page.';
exit();
}
}// close if post
?>

我再次关注某人的教程，并尝试将其实施到我的网站，如果有效，这将是完美的。请注意登录后没有设置$ toplinks的原因。

Answer 1

我认为问题是，您必须在要使用会话的每个文件中包含session_start()。否则它在文件中工作就像普通数组但不是全局数据。在你的表格中，我看不到你开始你的会话。

编辑：仅当您有2个文件时才需要此功能。如果您只有一个文件并且包含另一个页面，那么当您在顶部包含一次时它就会正常工作。

Answer 2

如果要注销，则应创建注销文件，并包含

session_destroy();

可能通过执行以下操作添加一个href来获取重定向链接：

header('location:index.php'); // will return you to index as soon as you logout.

登录后未保存会话

2 个答案: