/**
*
* @param WpSubscription $subscription
* @return string MySQL DATETIME string format
*/
public static function calculateNextDateExpiresFromSubscription($subscription)
{
// contains the needed day/hour/minute/second
$end = date_create_from_format('Y-m-d H:i:s', $subscription->getEnd(), new DateTimeZone('GMT'));
$now = new DateTime('now', new DateTimeZone('GMT'));
$expire = date_create_from_format('Y-m-d H:i:s', $now->format('Y-m-') . $end->format('d H:i:s'), new DateTimeZone('GMT'));
if ($expire < $now) {
$expire->modify('+1 month');
}
return $expire->format('Y-m-d H:i:s');
}
