private function merge_query_params($url, $params)
{
$urlparts = InputFilter::parse_url($url);
if (!isset($urlparts['query'])) {
$urlparts['query'] = '';
}
if (!is_array($params)) {
parse_str($params, $params);
}
$urlparts['query'] = http_build_query(array_merge(Utils::get_params($urlparts['query']), $params), '', '&');
return InputFilter::glue_url($urlparts);
}