PHP/Network/checkdnsrr

checkdnsrr-2.php

 
<?php
   $email = "ceo@example.ru";
   $domain = explode("@",$email);
   
   $valid = checkdnsrr($domain[1], "ANY");
   if($valid) echo "The domain has an MX record!";
   else echo "Cannot locate MX record for $domain[1]!";
?>

checkdnsrr.php

 
<?php
   $recordexists = checkdnsrr("example.ru", "ANY");
   if ($recordexists) echo "The domain name has been taken. Sorry!";
   else echo "The domain name is available!";
?>