PHP domain whois script not return all information

Question

I need to get whois information. My function is working fine, but isn't returning "Administrative Contact, Registrant Contact, Administrative Contact, Technical Contact" information.

But when I run following command on my Mac it returns all information "whois google.com"

Here is my php function to get information from whois server

function QueryWhoisServer($whoisserver, $domain) {
$port = 43;
$timeout = 10;
$fp = @fsockopen($whoisserver, $port, $errno, $errstr, $timeout) or die("Socket Error " . $errno . " - " . $errstr);

fputs($fp, $domain . "\r\n");
$out = "";
while(!feof($fp)){
    $out .= fgets($fp);
}

fclose($fp);
return $out; 
} 
echo QueryWhoisServer("whois.verisign-grs.com", "google.com");

Answer 1

I found a possible solution, assuming (as checked by myself) registrar whois servers are returning contact infos.

To do this, it is needed for each domain to query related registrar whois server as per code below.

Check code comments for little explanation of what each function does.

function GetWhoisInfo($whoisserver, $domain){
  $port = 43;
  $timeout = 10;
  $fp = @fsockopen($whoisserver, $port, $errno, $errstr, $timeout) or die("Socket Error " . $errno . " - " . $errstr);
  stream_set_blocking($fp, true);
  fputs($fp, $domain . "\r\n");
  $out = "";

  while(!feof($fp)){
      $out .= fgets($fp);       
  }

  fclose($fp);  
  return $out;
}

function GetRegistrarWhoisServer($whoisserver, $domain) {
  $out = GetWhoisInfo($whoisserver, $domain);
  $rws_string = explode("\r\n", $out);
  $rws = explode("Registrar WHOIS Server: ", $rws_string[2])[1];  
  return $rws; 
}

function WhoisToJson($winfo) {
  $winfoarr = explode(PHP_EOL, $winfo);
  $jsonarr = [];
  foreach($winfoarr as $info){
   $infodata = explode(": ", $info);
   if($infodata[0] !== "")$jsonarr[$infodata[0]] = $infodata[1];    
   //avoid to process privacy info at the end of whois service output
   if($infodata[0] === "DNSSEC")break;
  }
  return json_encode($jsonarr);
} 

function QueryWhoisServer($whoisserver, $domain) {
  //query to $whoisserver whois to get registrar whois server address only
  $rws = GetRegistrarWhoisServer($whoisserver, $domain);

  //query to registrar whois server (registrar whois servers are returning contact infos)
  $out = GetWhoisInfo($rws, $domain);  

  //parsing infos and formatting to json
  return WhoisToJson($out);
} 

echo QueryWhoisServer("whois.verisign-grs.com", "google.com");