Simple User Authentication

Based off the original Simple User Authentication script I built a few months ago, I have now created three separate authentication tools, for different levels of authentication.

• The simplest, Page Locker prompts only for a password, and once that password has been entered, the page displays as normal for the remainder of the session. This script is intended to let only those who know the password access a page, for instance students in a class.
• The original, Simple User Authentication locks a page prompting for a username and password - ideal for an admin panel that only one user will need access to, or some other case where you need fairly strong protection against prying eyes, but don't need more than one person to access it.
• The most powerful (by far) is the UserManager Class, a fully functional, entirely self contained user management tool - include it in your website and you're all set to create and operate a user-based website, with custom user parameters (such as real name and email address) that you can define. Works anywhere PHP5 does, no database required.