[klaniak]

Here is an example if you want to use sessions:
My guess is probably you want to use mysql

PHP Code:

//you need to connect to database



session_start(); //we start the session

if(isset($_POST['submit']))

{

 $user=strip_tags(addslashes(($_POST['username']));

 $password=strip_tags(addslashes($_POST['password']));

//you select your database

//you grab the user id and name and compare them with $user and $password



$_SESSION['valid_user']="your id number from database";

$_SESSION['name']="the name of the user";



header('location: menu.php'); //the location where you want your users to be redirected

} else {

  header('location: sorry.php?not_logged=yes'); //the location if they are not logged

 } 

You can use the code and include it on all your protected pages,
include('./library/login.php');
if(!$_SESSION['valid_user']){header('location: sorry.php');}

You will need also a logout.php to destroy your session, here is an example:

PHP Code:

session_start();

unset($_SESSION);

session_destroy();

header('location: index.php');