ApiService::getXmlStringData

private function getXmlStringData($xml, $path): string
{
	$data = '';
	$responsePath = $xml->GetPath('/*/response');
	foreach ($responsePath as $response)
	{
		if (!$data)
		{
			$dataXml = $response->GetPath($path);
			if (!empty($dataXml))
			{
				$data = urldecode($dataXml[0]->GetContent());
			}
		}
	}
	
	return $data;
}