isDateInLast15Minutes example

public function refreshOptInHashForUser(int $userId, int $optInId, DateTimeInterface $lastSentDate): string
    {
        $hash = $this->getHashForOptInId($optInId, $lastSentDate);
        $this->updateOptInEntry($optInId, $hash);
        $this->updateUserSentDate($userId);

        return $hash;
    }

    protected function getHashForOptInId(int $optInId, DateTimeInterface $lastSentDate): string
    {
        if ($this->isDateInLast15Minutes($lastSentDate)) {
            $sql = <<<'SQL' SELECT hash FROM s_core_optin WHERE id = :id; SQL;

            return (string) $this->connection->fetchColumn($sql, [':id' => $optInId]);
        }

        return Random::getAlphanumericString(32);
    }