Zend_XmlRpc | Zend_XmlRpc Programmer's Reference Guide | Zend_XmlRpc_Client
# Introduction From its » home page, XML-RPC is described as a "...remote procedure calling using HTTP as the transport and XML as the encoding. XML-RPC is designed to be as simple as possible, while allowing complex data structures to be transmitted, processed and returned." Zend Framework provides support for both consuming remote XML-RPC services and building new XML-RPC servers.
Zend_XmlRpc | Zend_XmlRpc Programmer's Reference Guide | Zend_XmlRpc_Client