<?php
    if (ISSET($_POST["domain"])) {
        require_once("/protected/db.php");
        echo gethostbyname($_POST["domain"]);
    }
    echo "Error";
?>

$result = dns_get_record($_POST["domain"],DNS_ALL);
print_r($result);

if (ISSET($_POST["domain"])) {
    $txt=shell_exec('nslookup ' . $_POST["domain"]);
    $re1='.*?'; # Non-greedy match on filler
    $re2='(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(?![\d])'; # Uninteresting: ipaddress
    $re3='.*?'; # Non-greedy match on filler
    $re4='((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(?![\d])';   # IPv4 IP Address 1

    if ($c=preg_match_all ("/".$re1.$re2.$re3.$re4."/is", $txt, $matches))
    {
      $ipaddress1=$matches[1][0];
      echo $ipaddress1;
    }
}