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Trying:

$client = new IXR_Client('http://othersite.com/xmlrpc.php');

I get the error

Fatal error: Class 'IXR_Client' not found in footer.php

I can see the class in wp-includes/class-IXR.php, and I've checked that the path to this file is correct in wp-includes/functions.php as per this discussion.

Am I missing something needed to use this class in my custom theme's footer?

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    Rob, give the answer an up-vote out of courtesy, please. Commented Mar 20, 2014 at 15:46

1 Answer 1

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You mean class-IRC.php or class-IXR.php?

Just include the files before you call IXR_Client. I use such code to call IXR_CLIENT and it worked on my site:

include_once( ABSPATH . WPINC . '/class-IXR.php' );
include_once( ABSPATH . WPINC . '/class-wp-http-ixr-client.php' );

$client = new WP_HTTP_IXR_CLIENT( 'http://othersite.com/xmlrpc.php' );
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    Yes, meant class-IXR.php; works great!
    – rob-gordon
    Commented Mar 20, 2014 at 15:41

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