Use PHP to create XForms, Part 2: Using the PHP XForms Library to Create Useful XForms
http://www.ibm.com/developerworks/xml/library/x-xformsphp2/index.html

Anderson, Tyler
IBM
2007

Abstract:

This two-part article seriess is designed to get PHP developers up to speed in leveraging Web 2.0 XForms forms for their PHP forms development so that they can finally put their outdated Web 1.0 HTML forms away. In Part 1, you created the PHP XForms library. In this article, Part 2, you will enhance the library to include some error checking and convenience functions to help make using the library more manageable, and lastly you'll demo the library by creating a proof of concept XForm.