luos/workflow/engine/methods/services/Rest/XmlMessage.php

<?php
    /**
    * Class defined to be instanced and handle XML format messages.
    *
    *
    * @category   Zend
    * @package    ProcessMaker
    * @subpackage workflow
    * @copyright  Copyright (c) ProcessMaker  Colosa Inc.
    * @version    Release: @2.0.44@
    * @since      Class available since Release 2.0.44
    */
    
require_once("FormatedMessage.php");
/**
* Class defined to be instanced and handle XML format messages.
*/
class XmlMessage extends FormatedMessage
{
    /**
    * Call the parent Curl initialization and set the type of the message
    */
    public function XmlMessage()
    {
        parent::__construct();
        $this->type = "xml";
    }
    /**
    * Format the array parameter to a xml valid format. TODO: Need to find out a better way to do it.
    */
    protected function format(array $message)
    {
        if (empty($message)){		
            return ;
        }
        if (is_array($message)){
            $xml = "<?xml version='1.0'?><request>";
            foreach($message as $index => $data)
            {
                $xml .= "<" . $index . ">" . $data . "</" . $index . ">";
            }
            $xml .= "</request>";
        }
        return $xml;
    }
}

?>