JSON on the Server Side
http://www.ibm.com/developerworks/web/library/wa-ajaxintro11.html?S_TACT=105AGX08&S_CMP=EDU

McLaughlin, Brett D.
IBM
2007

Abstract:

JSON is an easy format to use for sending (and receiving) data that maps to objects, or even arrays of objects. In this final article of the series, you'll learn how to handle data sent to a server in the JSON format and how to reply to scripts using the same format.