为此,每个域都需要根据下面的代码查询相关的注册商whois服务器.

检查代码注释,了解每个函数的功能.

function GetWhoisInfo($whoisserver,$domain){
  $port = 43;
  $timeout = 10;
  $fp = @fsockoPEn($whoisserver,$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");