Update no-ip.com und tunnelbroker simultaneously (dyndns)

update_ip.php

<?php
# Update no-ip.com und tunnelbroker simultaneously (dyndns)

error_reporting(E_ALL);

$key  = "secret-key";
$addr = isset($_GET['addr']) ? $_GET['addr'] : $_SERVER['REMOTE_ADDR'];

if($_GET['key'] != $key){
  header("Status: 401 Unauthorized");
  die ("Not authorized");
}

if(strpos($addr, ".") === false){
  header("Status: 422 Unprocessable Entity");
  die ("Invalid IPv4 address");
}

header("Content-Type:text/plain");

if(file_get_contents("current_address") == $addr)
  die("address unchanged");

echo "Updating no-ip ... ";
echo file_get_contents("https://user:password@dynupdate.no-ip.com/nic/update?hostname=myhost&myip=$addr");
echo "\n";
echo "Updating tunnelbroker ... ";
echo file_get_contents("https://user:password@ipv4.tunnelbroker.net/ipv4_end.php?ip=$addr&tid=1234");

file_put_contents("current_address", $addr);

?>