The zend-server family of classes provides functionality for the various server
classes, including zend-xmlrpc and
Zend\Server\Server provides an interface that mimics PHP’s
all RPC-style server classes should implement this interface in order to provide a
standard server API.
Zend\Server\Reflection tree provides a standard mechanism for performing
function and class introspection for use as callbacks with the server classes,
and provides data suitable for use with