title: Which PHP RPC (XML or JSON) library have you successfully used?
body: <p>Which PHP RPC (XML or JSON) library have you successfully used?</p>
  
  <p>I have done some research but haven't been able to find one library that stands out from the others.</p>
  
  <p>I've found the following:</p>
  
  <p><a href="http://phpxmlrpc.sourceforge.net/" rel="nofollow noreferrer">XML-RPC for PHP</a></p>
  
  <p><a href="http://pear.php.net/package/XML_RPC/" rel="nofollow noreferrer">XML_RPC (PEAR)</a></p>
  
  <p><a href="http://jsonrpcphp.org/" rel="nofollow noreferrer">JSON-RPC PHP</a></p>
  
  <p>And a few others that either don't look very active or mature.</p>