Use API/Curl to create a new subdomain in both CloudFlare and cPanel

create-subdomain.php

<?php

/**
 * Create Subdomains
 *
 * Note: This script was designed to be called silently by a bash script for project creation.
 * 	Add to bash script: php "$HOME/scripts/php/create-subdomains.php" "$new_account_subdomain"
 * 
 * Requires "jamesryanbell/cloudflare": "^1.11" for the CloudFlare PHP library
 * Recommends "kint-php/kint": "^3.2" for improved temporary PHP debugging
 *
 * @author Darren Sopiarz <dsthedev@gmail.com>
 * @todo pass in bash variables from main script and verify that everything all works together
 */

// Load Composer
require_once dirname(__FILE__) . '/../../vendor/autoload.php';

// This grabs the first argument being passed in from a bash script that calls this script
$new_subdomain = $argv[1];
// $new_subdomain = 'noselfsigned';

if ('' == $new_subdomain || empty($new_subdomain)) {
	die("No subdomain entered.\n");
}

/**
 * create_cloudflare_subdomain
 *
 * @todo Move the credentials into a safer folder on the server and include it above to gain secure access
 * @todo Find a way to add a check to see if it fails, and pass a message back into calling bash script
 */
function create_cloudflare_subdomain($subdomain = '')
{
	// Cloudflare Credentials
	$email    = 'user@email.com';
	$auth_key = 'getfromcloudflareaccount';
	$zone_id  = 'getfromcloudflareaccount';

	// New Record Information
	$record_type = 'A';
	$servers_ip  = 'XXX.XX.XX.XX';
	$ttl         = null;
	$proxied     = false;

	// 1. Connect to CloudFlare
	$CFAPI = new \Cloudflare\Api($email, $auth_key);

	// 2. Instantiate the DNS Class for CloudFlare.
	$CFDNS = new \Cloudflare\Zone\Dns($CFAPI);

	// 3. Create the DNS Record
	$CFDNS->create($zone_id, $record_type, $subdomain, $servers_ip, $ttl, $proxied);
}

create_cloudflare_subdomain($new_subdomain);

/**
 * create_new_cpanel_subdomain
 *
 * @link https://stackoverflow.com/questions/31534861/how-to-create-subdomains-using-curl#answer-31542859
 */
function create_new_cpanel_subdomain($subdomain = '')
{
	$cpanel_user = 'username';
	$rootdomain  = 'sub.domain.com';
	$whm_user    = 'root';
	$whm_port    = '2087';
	$whm_pass    = 'superstrongpassword';
	$doc_root    = '%2Fprojects%2F' . $subdomain . '%2Fpublic_html';
	$header[0]   = "Authorization: Basic " . base64_encode($whm_user . ":" . $whm_pass) . "\n\r";
	$result      = '';
	$query       = 'https://' . $rootdomain . ':' . $whm_port . '/json-api/cpanel?cpanel_jsonapi_user=' . $cpanel_user
		. '&cpanel_jsonapi_apiversion=2&cpanel_jsonapi_module=SubDomain&cpanel_jsonapi_func=addsubdomain&domain='
		. $subdomain . '&rootdomain=' . $rootdomain . '&dir=' . $doc_root;

	$curl_handle = curl_init();                             // Create Curl Object
	curl_setopt($curl_handle, CURLOPT_SSL_VERIFYPEER, 1);   // Don't allow self-signed certs?
	// curl_setopt($curl_handle, CURLOPT_SSL_VERIFYHOST, 0);   // Allow certs that do not match the hostname
	curl_setopt($curl_handle, CURLOPT_HEADER, 0);           // Do not include header in output
	curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);   // Return contents of transfer on curl_exec
	curl_setopt($curl_handle, CURLOPT_HTTPHEADER, $header); // set the username and password
	curl_setopt($curl_handle, CURLOPT_URL, $query);         // execute the query
	$result = curl_exec($curl_handle);
	if ($result == false) {
		error_log("curl_exec threw error \"" . curl_error($curl_handle) . "\" for $query");
	}
	curl_close($curl_handle);
}

create_new_cpanel_subdomain($new_subdomain);