Develop PHP applications with Picasa Web Albums
http://www.ibm.com/developerworks/opensource/library/x-picasalbum/index.html?S_TACT=105AGX44&S_CMP=EDU

Vaswani, Vikram
IBM
2008

Abstract:

Picasa Web Albums offers Web application developers a REST-based Data API to manipulate the photos and albums stored on its servers. PHP's SimpleXML extension and Zend's GData Library are ideal to process the XML feeds generated by this API so you can customize PHP photo management and photo sharing applications. In this article, meet the Picasa Web Albums Data API and see how you can use it to retrieve photos and photo metadata; add, modify and delete photos; and perform keyword searches of Picasa's user-generated content.