Replaced user registration system with a well-written, object-oriented open source php user class that interfaces with sqlite3 using a PDO object. Requirements: sqlite3 and current directory structure setup with appropriate permissions given to php/apache server to access ./private and ./private/users. Also, sendmail should be setup on the server.

link: http://pomax.nihongoresources.com/pages/usered/

link: https://github.com/Pomax/Usered