if($q = mysql_query("UPDATE `table-1`
      SET `cell-1` = '1',
             `last_load` = IF(`last_load` = '0000-00-00 00:00:00',
                                       DATE_ADD(NOW(), INTERVAL 10 DAY),
                                       IF(`last_load` < CURDATE(),
                                              DATE_ADD(NOW(), INTERVAL 10 DAY),
                                              DATE_ADD(`last_load`, INTERVAL 10 DAY)
                                        )
                              ) WHERE `column_id` = '$column_id'"))
{
  $q = mysql_query("SELECT `last_load` FROM `table-1` WHERE `column_id` = '$column_id'");
  send(true,mysql_fetch_assoc($q)['last_load']);
}