Ip Updater

ip-updater.php

<?php

$ipFile = '/tmp/ip.txt';

$username = 'user';
$password = 'pass';
$hostname = 'test.test.com';
$ip = '';

$ip = @file_get_contents('http://wtfismyip.com/text');
$lastIp = @file_get_contents($ipFile);

if($ip && $ip != $lastIp) {
    $url = sprintf('https://%s:%s@www.dnsdynamic.org/api/?hostname=%s&myip=%s', $username, $password, $hostname, $ip);

    $response = @file_get_contents($url);

    print_r($response);
}