public static function toXml($writer, $data, $node)
{
foreach ($data as $key => $value) {
if (is_numeric($key)) {
$key = $node;
}
if (is_array($value)) {
xmlwriter_start_element($writer, $key);
OC_OCS::toxml($writer, $value, $node);
xmlwriter_end_element($writer);
} else {
xmlwriter_write_element($writer, $key, $value);
}
}
}