简单的php登录系统的问题 [英] problem with the simple php login system

问题描述

我在创建一个简单的登录系统时遇到了问题..

i我只是获取用户名和pwd表单数据库..如果用户名和密码正确...我只是想重定向到另一页显示



欢迎用户名



这是我的登录页面代码

i have a problem in creating a simple login system..
i am just fetching the username and pwd form database.. and if username and pwd is correct.. i am just trying to redirect to the other page to show that

welcome username

here is my login page code

<?php

$host = 'localhost'; 
$user = 'root'; 
$password = ''; 
$db = 'dbsneaker'; 

$link = mysql_connect($host,$user,$password) or die('Error in Server information');
mysql_select_db($db,$link) or die('Can not Select Databasse');



$userName = mysql_real_escape_string($_POST['username']); 
$password = mysql_real_escape_string($_POST['password']);


$query = "select * from tbladmin where admin_usr_name='$userName' and admin_pwd='$password'";

$res = mysql_query($query);

$rows = mysql_num_rows($res);


if($rows==1)


{
   //echo "login successful";
$_SESSION['userName']=$userName;    // please take a look on session vairiable please
$_SESSION['password']=$password;
header("location:success.php");
}
else
{
echo 'wrong Username or password';
}

?>

这里是success.php页面的代码

here is the code for success.php page

<?php
session_start();
if($_SESSION['userName']!='')
{
header("location:login_form.php");

}
else
{
echo '<h2>Successfully Login <br /> </h2>';
echo "hello=". $_SESSION['userName'];

echo '<a href="logout.php"> Log Out</a>';
}

?>

i我遇到这些错误



（！）注意：未定义的索引：C中的用户名：\ wamp \ www。\ tlogin sys \ .success.php在第3行

通话栈

＃时间记忆功能位置

1 0.0006 671144 {main}（）.. \ .success.php： 0

成功登录



（！）注意：未定义的索引：C中的用户名：\ wamp \\\login sys \\ 11号线上的@success.php

通话栈

＃时间记忆功能位置

1 0.0006 671144 {main}（）.. \ success.php：0

i am getting these errors

( ! ) Notice: Undefined index: userName in C:\wamp\www\login sys\success.php on line 3
Call Stack
# Time Memory Function Location
1 0.0006 671144 {main}( ) ..\success.php:0
Successfully Login

( ! ) Notice: Undefined index: userName in C:\wamp\www\login sys\success.php on line 11
Call Stack
# Time Memory Function Location
1 0.0006 671144 {main}( ) ..\success.php:0

推荐答案

host = ' 本地主机';

host = 'localhost';

user = ' 根;

user = 'root';

密码 = ' ';

password = '';

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