我正在php中尝试一个登录页面示例。我得到错误：此网页有一个重定向循环详细信息显示：错误代码：ERR_TOO_MANY_DIRECTS
这是我的代码：
index.php
<?php
include('login.php'); // Includes Login Script
if(isset($_SESSION['login_user'])){
header("location: profile.php");
}
?>
<form action="" method="post">
<label>UserName :</label>
<input id="name" name="username" placeholder="username" type="text">
<label>Password :</label>
<input id="password" name="password" placeholder="**********" type="password">
<input name="submit" type="submit" value=" Login ">
<span><?php echo $error; ?></span>
</form>
login.php
<?php
session_start();
$error='';
if (isset($_POST['submit'])) {
if (empty($_POST['username']) || empty($_POST['password'])) {
$error = "Username or Password is invalid";
}
else
{
$username=$_POST['username'];
$password=$_POST['password'];
$connection = mysql_connect("localhost", "root", "");
$username = stripslashes($username);
$password = stripslashes($password);
$username = mysql_real_escape_string($username);
$password = mysql_real_escape_string($password);
$db = mysql_select_db("rjtest", $connection);
$query = mysql_query("select * from login where myPassword='$password' AND myUserName='$username'", $connection);
$rows = mysql_num_rows($query);
if ($rows == 1) {
$_SESSION['login_user']=$username;
header("location: profile.php");
} else {
$error = "Username or Password is invalid";
}
}
}
?>
profile.php
<?php
include('session.php');
?>
<!DOCTYPE html>
<html>
<head>
<title>Your Home Page</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="profile">
<b id="welcome">Welcome : <i><?php echo $login_session; ?></i></b>
<b id="logout"><a href="logout.php">Log Out</a></b>
</div>
</body>
</html>
session.php
<?php
$connection = mysql_connect("localhost", "root", "");
$db = mysql_select_db("rjtest", $connection);
session_start();
$user_check=$_SESSION['login_user'];
$ses_sql=mysql_query("select myUsername from login where myUsername='$user_check'", $connection);
$row = mysql_fetch_assoc($ses_sql);
$login_session =$row['username'];
if(!isset($login_session)){
header('Location: index.php');
}
?>
和logout.php
<?php
session_start();
if(session_destroy())
{
header("Location: index.php");
}
?>
我似乎不明白为什么。我得到这个代码的网站现在处于非活动状态，所以这就是我在这里问这个问题的原因。希望你们能帮我。很抱歉发了这么长的帖子。
要回答的注释：
我认为发生的事情是，你的代码出错了，而你没有看到它，导致它与它应该显示给你的错误作斗争。
您有使用"username"作为行的$login_session =$row['username'];，但您没有在查询select myUsername from login where myUsername中选择它。
所以，我认为，如果这一行实际上不存在，你就需要进行
$login_session =$row['myUsername'];