private function _getXnames($from, $to, $step)
{
$names = array();
$dateFrom = new UDate(trim($from));
$dateTo = new UDate(trim($to));
do {
$from = new UDate(trim($dateFrom));
$to = new UDate(trim($dateFrom->modify($step)));
$names[trim($from->format('d/M/y'))] = array('from' => trim($from), 'to' => trim($to));
} while ($dateFrom->before($dateTo));
return $names;
}
