FluidTYPO3\Vhs\ViewHelpers\Format\DateRangeViewHelper::render PHP Method

    public function render()
    {
        if (true === isset($this->arguments['start']) && false === empty($this->arguments['start'])) {
            $start = $this->arguments['start'];
        } else {
            $start = 'now';
        }
        $startDateTime = $this->enforceDateTime($start);
        if (true === isset($this->arguments['end']) && false === empty($this->arguments['end'])) {
            $endDateTime = $this->enforceDateTime($this->arguments['end']);
        } else {
            $endDateTime = null;
        }
        if (true === isset($this->arguments['intervalFormat']) && false === empty($this->arguments['intervalFormat'])) {
            $intervalFormat = $this->arguments['intervalFormat'];
        }
        if (null === $intervalFormat && null === $endDateTime) {
            throw new Exception('Either end or intervalFormat has to be provided.', 1369573110);
        }
        if (true === isset($intervalFormat) && null !== $intervalFormat) {
            try {
                $interval = new \DateInterval($intervalFormat);
            } catch (\Exception $exception) {
                throw new Exception('"' . $intervalFormat . '" could not be parsed by \\DateInterval constructor.', 1369573111);
            }
        } else {
            $interval = $endDateTime->diff($startDateTime);
        }
        if (null !== $interval && null === $endDateTime) {
            $endDateTime = new \DateTime();
            $endDateTime->add($endDateTime->diff($startDateTime));
            $endDateTime->add($interval);
        }
        $return = $this->arguments['return'];
        if (null === $return) {
            $spaceGlue = (bool) $this->arguments['spaceGlue'];
            $glue = strval($this->arguments['glue']);
            $startFormat = $this->arguments['format'];
            $endFormat = $this->arguments['format'];
            if (null !== $this->arguments['startFormat'] && false === empty($this->arguments['startFormat'])) {
                $startFormat = $this->arguments['startFormat'];
            }
            if (null !== $this->arguments['endFormat'] && false === empty($this->arguments['endFormat'])) {
                $endFormat = $this->arguments['endFormat'];
            }
            $output = $this->formatDate($startDateTime, $startFormat);
            $output .= true === $spaceGlue ? ' ' : '';
            $output .= $glue;
            $output .= true === $spaceGlue ? ' ' : '';
            $output .= $this->formatDate($endDateTime, $endFormat);
        } elseif ('DateTime' === $return) {
            $output = $endDateTime;
        } elseif (true === is_string($return)) {
            if (false === strpos($return, '%')) {
                $return = '%' . $return;
            }
            $output = $interval->format($return);
        } elseif (true === is_array($return)) {
            $output = [];
            foreach ($return as $format) {
                if (false === strpos($format, '%')) {
                    $format = '%' . $format;
                }
                array_push($output, $interval->format($format));
            }
        }
        return $output;
    }