These functions can be used to write XML-RPC servers and clients. You can find more information about XML-RPC at http://www.xmlrpc.com/, and more documentation on this extension and its functions at http://xmlrpc-epi.sourceforge.net/.
The extension is unbundled from php-src as of PHP 8.0.0, because the underlying libxmlrpc has obviously been abandoned. It is recommended to reevaluate using this extension.
Package built for PHP 8.3 as Software Collection (php83 by remi).