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Editorial Team
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Asked: 2026-06-12T14:05:50+00:00

I am trying to run the PEAR XMLRPC inside a plugin function to do

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I am trying to run the PEAR XMLRPC inside a plugin function to do some validation. It is all working fine in a standalone app that in a folder on my server, but as soon as I put all the files into my plugin folder, the:

require_once 'XML/RPC2/Client.php';

doesn’t work. The Client.php file return an error:

Warning:  require_once(XML/RPC2/Exception.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream:

So i assume it has to do with relative vs non-relative files, but I can’t seem to figure out why it works outside of wordpress just fine.

If I start changing all the 

require_once 'XML/RPC2...

to be the absolute path on the server the errors start going away, but I feel like I shouldn’t have to change the source of PEAR and XMLRPC to do what i need. Any Suggestions?

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1 Answer

  1. Editorial Team

    You could update the PHP include path:

    set_include_path(get_include_path() . PATH_SEPARATOR . $pathToPearLibs);
require_once($pathToPearLibs . 'XML/RPC2/Client.php');

    This will give PHP one more (correct) place to look after it attempts to load from the wrong place.

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