This advanced PHP tutorial will teach you how to create a login system using MySql. It will take you through user registration, user verification and a forgot password feature.

This tutorial describes three methods to authenticate a user. First is by hardcoding the user info in the script. Second, check the user information in the database. Third is by adding image verification in the login form where the user must enter the random numbers displayed in the image.

It is quite common to have the need to password protect a certain file or a set of files, in order to prevent unauthorized access to those files. There are many different alternatives on how to do this including, sessions, cookies, JavaScript and HTTP authentication. Peter shows you how to implement simple HTTP authentication.

This tutorial along with sample code explains how to make a hardcoded admin password gateway using PHP. It also covers how to use .htaccess for server side password protection.

One cool thing about php is that you can fairly easily validate users before displaying content on a page by page basis. Let's say you don't want to restrict the entire directory using htaccess, this is a neat alternative. This tutorial shows how to create a simple page-based login system using PHP and mySQL.

This tutorial covers the concepts of creating a membership system from A to Z on your website. It includes signup, activation, login and lost password recovery as well as Session Management. It is very in depth and extensive.

Get started using UMA. UMA is a user management and authentication system written in PHP. UMA can greatly reduce the time and effort put into every project.

This three-page online tutorial/article talks about managing user session and authntication using PHPLIB, a set of PHP classes designed to make is easier to develop web based PHP applications.

This comprehensive 8-page online tutorial explains how to authenticate and track users with PHP. Main topics include: HTTP Authentication with PHP, Validation Against a Flat File, Authenticate Against a Database, Using Cookies, and Sessions and User Preferences.

This is a built in admin system that allows users to login and logout.