IndividualSubscription::isValid PHP Méthode

    function isValid($check = SUBSCRIPTION_DATE_BOTH, $checkDate = null)
    {
        $subscriptionDao = DAORegistry::getDAO('IndividualSubscriptionDAO');
        return $subscriptionDao->isValidIndividualSubscription($this->getData('userId'), $this->getData('journalId'), $check, $checkDate);
    }