$Addresses->ptr_unlink_subnet_addresses($subnet->id);
// fetch all hosts
$hosts = $Addresses->fetch_subnet_addresses($subnet->id, "ip_addr", "asc");
// create PTR records
if (sizeof($hosts) > 0) {
    foreach ($hosts as $h) {
        // ignore PTR
        if ($h->PTRignore == "1") {
            $ignored[] = $h;
        } elseif ($Result->validate_hostname($h->dns_name) !== false) {
            // formulate new record
            $record = $PowerDNS->formulate_new_record($domain->id, $PowerDNS->get_ip_ptr_name($h->ip), "PTR", $h->dns_name, $values['ttl']);
            // insert record
            $PowerDNS->add_domain_record($record, false);
            // link
            $Addresses->ptr_link($h->id, $PowerDNS->lastId);
            // ok
            $success[] = $h;
        } else {
            $failures[] = $h;
        }
    }
} else {
    $empty = true;
}
# generate print
if (sizeof(@$success) > 0) {
    $print[] = "<div class='alert alert-success'><h4>Successful PTR records:</h4>";
    foreach ($success as $s) {
        $print[] = $PowerDNS->get_ip_ptr_name($s->ip) . " > " . $s->dns_name;
    }