phpMyHotels is a plug-in based general purpose online reservation platform.

It features booking services (plugged-in), content publishing, affiliate users managing.
It's implemented with PHP Fusebox 3 framework over an XML-based multi-tier architecture.

Here you can find some useful developer-oriented documentation:

• Application wireframe
• Application prototype
• Requirements
• Development reference

phpMyHotels Sourceforge project page here.