freebsd-ports/net/pear-XML_RPC2/pkg-descr

XML_RPC2 is a pear package providing XML_RPC client and server
services.XML-RPC is a simple remote procedure call protocol built
using HTTP as transport and XML as encoding.

As a client library, XML_RPC2 is capable of creating a proxy
class which exposes the methods exported by the server. As a
server library, XML_RPC2 is capable of exposing methods from
a class or object instance, seamlessly exporting local methods
as remotely callable procedures.

WWW: http://pear.php.net/package/XML_RPC2/