public function getTimePeriodIntervalId($start_time) { $interval_id = 0; if ($this->getDetailInterval() == self::DETAIL_INTERVAL_DAY) { $interval_id = UtilityFunctions::sqlToDaysConversion(date("m/d/Y", $start_time)); } else { if ($this->getDetailInterval() == self::DETAIL_INTERVAL_WEEK) { $interval_id = UtilityFunctions::sqlWeekConversion(date("m/d/Y", $start_time)); } else { if ($this->getDetailInterval() == self::DETAIL_INTERVAL_MONTH) { $interval_id = date("n", $start_time); } } } return $interval_id; }