function checkPTRZone($ip, $domain_id)
{
    global $fmdb, $__FM_CONFIG;
    $octet = explode('.', $ip);
    $zone = "'{$octet[2]}.{$octet[1]}.{$octet[0]}.in-addr.arpa', '{$octet[1]}.{$octet[0]}.in-addr.arpa', '{$octet[0]}.in-addr.arpa'";
    basicGet('fm_' . $__FM_CONFIG['fmDNS']['prefix'] . 'domains', $zone, 'domain_', 'domain_name', "OR domain_name IN ({$zone}) AND domain_status!='deleted'");
    if ($fmdb->num_rows) {
        $result = $fmdb->last_result;
        return array($result[0]->domain_id, null);
    } else {
        basicGetList('fm_' . $__FM_CONFIG['fmDNS']['prefix'] . 'domains', 'domain_name', 'domain_', "AND domain_mapping='reverse' AND domain_name LIKE '%-%-%'");
        if ($fmdb->num_rows) {
            for ($i = 0; $i < $fmdb->num_rows; $i++) {
                $domain_name = $fmdb->last_result[$i]->domain_name;
                $range = array();
                foreach (array_reverse(explode('.', $domain_name)) as $key => $tmp_octect) {
                    if (in_array($key, array(0, 1))) {
                        continue;
                    }
                    if (strpos($tmp_octect, '-') !== false) {
                        list($start, $end) = explode('-', $tmp_octect);
                        $range['start'][] = $start;
                        $range['end'][] = $end;
                    } else {
                        $range['start'][] = $tmp_octect;
                        $range['end'][] = $tmp_octect;
                    }
                }
                $range['start'] = array_pad($range['start'], 4, 0);
                $range['end'] = array_pad($range['end'], 4, 255);
                if (ip2long(join('.', $range['start'])) <= ip2long($ip) && ip2long(join('.', $range['end'])) >= ip2long($ip)) {
                    return array($fmdb->last_result[$i]->domain_id, null);
                }
            }
        }
    }
    /** No match so auto create if allowed */
    if (getOption('auto_create_ptr_zones', $_SESSION['user']['account_id'], $_SESSION['module']) == 'yes') {
        return autoCreatePTRZone($zone, $domain_id);
    }
    return array(null, __('Reverse zone does not exist.'));
}
function checkPTRZone($ip, $domain_id)
{
    global $fmdb, $__FM_CONFIG;
    list($ip1, $ip2, $ip3, $ip4) = explode('.', $ip);
    $zone = "'{$ip3}.{$ip2}.{$ip1}.in-addr.arpa', '{$ip2}.{$ip1}.in-addr.arpa', '{$ip1}.in-addr.arpa'";
    basicGet('fm_' . $__FM_CONFIG['fmDNS']['prefix'] . 'domains', $zone, 'domain_', 'domain_name', "OR domain_name IN ({$zone}) AND domain_status!='deleted'");
    if ($fmdb->num_rows) {
        $result = $fmdb->last_result;
        return array($result[0]->domain_id, null);
    } else {
        if (getOption('auto_create_ptr_zones', $_SESSION['user']['account_id'], $_SESSION['module']) == 'yes') {
            return autoCreatePTRZone($zone, $domain_id);
        }
        return array(null, __('Reverse zone does not exist.'));
    }
}