DNS::isZone PHP Method

    function isZone($domain)
    {
        $sql = sprintf("SELECT count(domainid) FROM domains WHERE domain = %s", $this->db->quote($domain));
        $result = $this->db->getOne($sql);
        if ($result > 0) {
            return true;
        } else {
            $sql = sprintf("SELECT count(queueid) FROM add_queue WHERE domain = %s AND completed = '0'", $this->db->quote($domain));
            $result = $this->db->getOne($sql);
            if ($result > 0) {
                return true;
            }
            return false;
        }
    }