create.php

<?php
session_start();
// allow error reporting
ini_set('display_errors', true);

// check if parameters are set properly
if(isset($_POST['subdomain']) && isset($_POST['port']) && isset($_POST['target']) && isset($_POST['g-recaptcha-response'])) {
// include Cloudflare & reCaptcha API Libraries
require_once "/var/www/shulker/vendor/autoload.php";

// initialize recaptcha
$secret = "YOU THOUGHT?";
$recaptcha = new \ReCaptcha\ReCaptcha($secret);
$resp = $recaptcha->verify($_POST['g-recaptcha-response'], $_SERVER['HTTP_CF_CONNECTING_IP']);
if ($resp->isSuccess()) {
// Set API Credentials
$key = new Cloudflare\API\Auth\APIKey('explosivenight001@gmail.com', 'haha you don't get my api key, faggot');

// create adapter
$adapter = new Cloudflare\API\Adapter\Guzzle($key);

// create endpoint objects
$user = new Cloudflare\API\Endpoints\User($adapter);
$zones = new \Cloudflare\API\Endpoints\Zones($adapter);
$dns = new \Cloudflare\API\Endpoints\DNS($adapter);

// Get Zone ID
$zoneID = $zones->getZoneID("shulker.me");

// check if subdomain already exists.
foreach($dns->listRecords($zoneID)->result as $record) {
        if($record->name == "_minecraft._tcp." . $_POST['subdomain'] . ".shulker.me") {
                $_SESSION['success'] = false;
                $_SESSION['code'] = 2;
                header('location: /');
        }
}

// set parameters
$srvdata = [
'weight' => 100,
'priority' => 100,
'name' => strtolower($_POST['subdomain']),
'proto' => '_tcp',
'port' => intval($_POST['port']),
'target' => strtolower($_POST['target']),
'service' => '_minecraft'
];

// create record
if ($dns->addRecord($zoneID, "SRV", "", "", 120, false, "", $srvdata)) {
        $_SESSION['address'] = strtolower($_POST['subdomain']) . ".shulker.me";
    header("location: /");
} else {
        $_SESSION['success'] = false;
        $_SESSION['code'] = 0;
        header('location: /');
}
} else {
        $_SESSION['success'] = false;
        $_SESSION['code'] = 1;
    header('location: /');
}
} else {
        $_SESSION['success'] = false;
        $_SESSION['code'] = 0;
        header('location: /');
}