This script is not only a secure login script, it also allows great control and can be integrated easily into most sites as well as the following features:

Redirection based on the users login information
        - The site administrator can dictate the page that the user will be redirected to once the user has been authenticated
Control Panel Administration
        - The control panel administration allows Administrators the following functions:
                - Add Users
                - Modify user information
                - Add users to groups
                - Delete users
                - Undelete Users
                - Ban Users
                - Lift user bans
                - Ban IP Addresses
                - Lift IP Address bans
                - View and sort login information
                - Require users to change their password at next login
                - Require users to activate their account as to verify their e-mail address before they are able to login
                - View all user information
Other functionality of this package:
        - Control access to pages through username or groups
        - Allows users to request an e-mail of their login information
        - Allows users to change their own password and e-mail address
        - Allows users to self-register
       
All of the pages viewed by users have been written in html as to allow site creators easy integration into their site.
All html pages can be altered, just do not change the functionality of the page.
For example, if the html page contains to fields named X and Y and the form is posted to page.php, do not change the name of the field or the name of the page that the information is posted to unless you know what you are doing.

Requirements:
        - Website server with php functionality.
        - MySQL Database

The installation process is very simple.  You will need the following information to complete the installation:
        - a MySQL database
        - The username and password for that database
        - Knowledge of the database server (typically localhost, but it could be different as with 1&1 hosted sites)
        - FTP ability
That's it, the installation walks you through all of the steps and creates all of the table required as well as the configurations settings and the administrator account setup.

Package Contents and Description:

* - indicates that this page is customizable
** - indicates that this file or folder can be deleted after installation is complete

How-to restrict access to your pages:
1.    All secure pages must be php pages.  You can easily create any page in html and simply save it with a .php extention.
2.    This code must be added prior to any code on the page:

<?php

//prevents caching
header("Expires: Sat, 01 Jan 2000 00:00:00 GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: post-check=0, pre-check=0",false);
session_cache_limiter();
session_start();

//this should the the absolute path to the config.php file
//(ie /home/website/yourdomain/login/config.php or
//the location in relationship to the page being protected - ie ../login/config.php )
require('../config.php');

//this should the the absolute path to the functions.php file - see the instrcutions for config.php above
require('../functions.php');

//this is group name or username of the group or person that you wish to allow access to
// - please be advise that the Administrators Groups has access to all pages.
if (allow_access(Administrators) != "yes")
{                       

//this should the the absolute path to the no_access.html file - see above                                    
include ('no_access.html');
exit;
}
?>

For a more precise sample of the code you should use, please Click Here.

That should do it...