Services_Hoptoad::addXmlVars PHP Method

    function addXmlVars($parent, $key, $source)
    {
        if (empty($source)) {
            return;
        }
        $node = $parent->addChild($key);
        foreach ($source as $key => $val) {
            $var_node = $node->addChild('var', htmlspecialchars(var_export($val, true)));
            $var_node->addAttribute('key', $key);
        }
    }