public static function &get_instance()
{
if (!self::$instance) {
self::$instance = new self();
}
return self::$instance;
}
public function get_days($start_timestamp, $end_timestamp, $flag = 0)
{
$dao = DB_PMTDataObject::get_instance();
$sql = "select * from calendar where timestamp >= " . $start_timestamp . " and timestamp <= " . $end_timestamp . " and is_valid=" . $flag;
$ret = $dao->query($sql, null);
return $ret ? $ret : false;
}