Secured Registration, Login, and User System was designed to be easy to use and easily customizable to fit to your needs no matter what they may be. All of the code used is well commented and well explained.
Once you follow the installation instructions it's as simple as copying and pasting this bit of code into any php page you want to require a registration and login to access.
The system has a blank page included to build your own pages from as a template and also has a full CRUD (Create, Read, Update, Delete) system for the user management and user role management.
There's also a user role creator within the system to allow for multiple levels of user access that is fully controlled per user from within the system.