Scalr\Stats\CostAnalytics\Iterator\ChartQuarterlyIterator::__construct PHP Méthode

    public function __construct($start, $end = null, $timezone = 'UTC')
    {
        $this->mode = 'quarter';
        $this->timezone = new DateTimeZone($timezone);
        $this->today = $this->getTodayDate();
        $this->start = new DateTime($start instanceof DateTime ? $start->format('Y-m-d 00:00:00') : $start, $this->timezone);
        $this->end = !empty($end) ? new DateTime($end instanceof DateTime ? $end->format('Y-m-d 00:00:00') : $end, $this->timezone) : null;
        $quarters = new Quarters(SettingEntity::getQuarters());
        $this->interval = '1 week';
        $currentPeriod = $quarters->getPeriodForDate($this->start);
        $this->start = $currentPeriod->start;
        $this->end = $currentPeriod->end;
        $this->wholePeriodPerviousEnd = clone $this->start;
        $this->wholePeriodPerviousEnd->modify('-1 day');
        $prevPeriod = $quarters->getPeriodForDate($this->wholePeriodPerviousEnd);
        $this->prevStart = $prevPeriod->start;
        $this->prevInterval = new \DateInterval('P' . sprintf("%d", $this->start->diff($this->end, true)->days) . 'D');
        $this->determinePrevEnd();
        $endoftheday = new \DateInterval('PT23H59M59S');
        $this->end->add($endoftheday);
        $this->prevEnd->add($endoftheday);
        $this->wholePeriodPerviousEnd->add($endoftheday);
        if (!$this->di) {
            $this->di = \DateInterval::createFromDateString($this->interval);
        }
        $this->dt = clone $this->start;
    }