MetaSubscription::getStartDate PHP Method

    protected function getStartDate()
    {
        $startDate = null;
        $sections = SubscriptionSection::GetSubscriptionSections($this->m_dbObject->getSubscriptionId());
        foreach ($sections as $section) {
            $sectionStartDate = $section->getStartDate();
            if ($sectionStartDate < $startDate || is_null($startDate)) {
                $startDate = $sectionStartDate;
            }
        }
        return $startDate;
    }