bla*_*l77 2 php mysql security authentication
我一直在用PHP登录进行大量研究,以及它们如何工作一段时间.我几天前遇到过这个网站.http://www.intechgrity.com/create-login-admin-logout-page-in-php-w/#comment-25300.看着它我注意到它正在使用session_registerPHP 5.3中的一个大问题.我开始玩它并且我得到了登录部分没有问题,但由于某种原因我无法在管理页面的标题中显示用户名.我想要的是:<h1>Welcome To Admin Page Username</h1>它给了我<h1>Welcome To Admin Page</h1>.我想知道是不是因为我有两个会话使用相同的var？
我对教程的更改:
check_login.php -
<?php
define(DOC_ROOT,dirname(__FILE__)); // To properly get the config.php file
$username = $_POST['username']; //Set UserName
$password = $_POST['password']; //Set Password
$msg ='';
if(isset($username, $password)) {
ob_start();
include(DOC_ROOT.'/config.php'); //Initiate the MySQL connection
// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($username);
$mypassword = stripslashes($password);
$myusername = mysqli_real_escape_string($dbC, $myusername);
$mypassword = mysqli_real_escape_string($dbC, $mypassword);
$sql="SELECT * FROM login_admin WHERE user_name='$myusername' and user_pass=SHA('$mypassword')";
$result=mysqli_query($dbC, $sql);
// Mysql_num_row is counting table row
$count=mysqli_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){
// Register $myusername, $mypassword and redirect to file "admin.php"
$_SESSION["admin"]= $myusername;
$_SESSION["password"]= $mypassword;
$_SESSION["name"]= $myusername;
header("location:admin.php");
}
else {
$msg = "Wrong Username or Password. Please retry";
header("location:login.php?msg=$msg");
}
ob_end_flush();
}
else {
header("location:login.php?msg=Please enter some username and password");
}
?>
admin.php -
<?php
session_start(); //Start the session
define(ADMIN,isset($_SESSION["name"])); //Get the user name from the previously registered super global variable
if(isset($_SESSION["admin"])){ //If session not registered
header("location:login.php"); // Redirect to login.php page
}
else //Continue to current page
header( 'Content-Type: text/html; charset=utf-8' );
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Welcome To Admin Page Demonstration</title>
</head>
<body>
<h1>Welcome To Admin Page <?php echo ADMIN /*Echo the username */ ?></h1>
<p><a href="logout.php">Logout</a></p> <!-- A link for the logout page -->
<p>Put Admin Contents</p>
</body>
</html>
这些是我改变的唯一两页.谢谢你的帮助.
更新: 我厌倦了所有回答的人的变化,但仍然空白.我只想放弃它.令我困惑的是它如何使用旧代码而不是新代码.谢谢你的帮助.
更新2: 感谢Gumbo关于使用的建议var_dump();.我做的是我从*check_login.php*中取出所有内容并将其放入admin.php并从中array(0){}转到array(3) { ["username"]=> string(6) "admin" ["admin"]=> string(6) "admin" ["password"]=> string(5) "************" }.
感谢大家的帮助.
有两件事是错的.将所有旧的更改为新的.(这样做是为了更好的格式化.)
define(ADMIN,isset($_SESSION["name"])); //old
define(ADMIN,$_SESSION["name"]); //new
$_SESSION["name2"]= $myusername; //old
$_SESSION["name"]= $myusername; //new
isset()返回一个布尔值,而不是值.
编辑:正如Gumbo所述,在常量ADMIN之后不需要分号.因此,只有两个错误.
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