Zend_XmlRpc_Server is composed of a variety of components, ranging from the server itself to request, response, and fault objects.

To bootstrap Zend_XmlRpc_Server, the developer must attach one or more classes or functions to the server, via the setClass() and addFunction() methods.

Once done, you may either pass a Zend_XmlRpc_Request object to Zend_XmlRpc_Server::handle(), or it will instantiate a Zend_XmlRpc_Request_Http object if none is provided -- thus grabbing the request from php://input.

Zend_XmlRpc_Server::handle() then attempts to dispatch to the appropriate handler based on the method requested. It then returns either a Zend_XmlRpc_Response-based object or a Zend_XmlRpc_Server_Faultobject. These objects both have __toString() methods that create valid XML-RPC XML responses, allowing them to be directly echoed.