). add_action('wp', function(){ remove_action('wp_head', 'rsd_link'); }, 9); // Hijack pingback_url for get_bloginfo (). add_filter('bloginfo_url', function($output, $property){ return ($property == 'pingback_url') ? null : $output; }, 11, 2); // Just disable pingback.ping functionality while leaving XMLRPC intact? add_action('xmlrpc_call', function($method){ if($method != 'pingback.ping') return; wp_die( 'Pingback functionality is disabled on this Blog.', 'Pingback Disabled!', array('response' => 403) ); });