Zend_Gdata makes use of
Zend_Http_Client to send
requests to google.com and fetch results. The response to most
Google Data requests is returned as a subclass of the
Zend_Gdata_App_Feed or
Zend_Gdata_App_Entry classes.
Zend_Gdata assumes your PHP application is
running on a host that has a direct connection to the Internet.
The Zend_Gdata client operates by contacting Google Data servers.