<?php 
$host = 'myhost.com';
$path = '/somepath'

//Init it
$rpc = new XmlRPC($host,$path);

//Call it using the call method
$output1 = $rpc->call('method',$arg1,$arg2);

//Call it using the __call php magic method
$output2 = $rpc->method($arg1,$arg2);

//$output1 == $output2