PHP Code:
<?
// Login & Session example by sde
// auth.php
// start session
session_start();
// convert username and password from _POST or _SESSION
if($_POST["username"])
{
$username=$_POST["username"];
$password=$_POST["password"];
}
elseif($_SESSION["username"])
{
$username=$_SESSION["username"];
$password=$_SESSION["password"];
}
// start and register session variables
session_register("username");
session_register("password");
// connect to database
include("connect.php");
// query for a user/pass match
$result=mysql_query("select * from users where username='" . $username . "' and password='" . $password . "'");
// retrieve number of rows resulted
$num=mysql_num_rows($result);
// print login form and exit if failed.
if($num < 1){
session_destroy();
echo "You are not authenticated. Please login.<br><br>
<form method=POST action=index.php>
username: <input type=text name=\"username\">
password: <input type=password name=\"password\">
<input type=submit>
</form>";
exit;
}
?>