Sync name and level to Mailchimp with PMPro and PMPro Mailchimp

my_pmpro_mailchimp_listsubscribe_fields.php

<?php
/**
 * Plugin Name: Paid Memberships Pro - Sync fields to MailChimp
 * Plugin URI: https://gist.github.com/alexmoise/
 * Description: A simple plugin to sync fields between MailChimp and Paid Memberships Pro - MailChimp Add On. Only works with Paid Memberships Pro and MailChimp Add On installed and configured. Created as plugin out of https://gist.github.com/strangerstudios/b8f64e713d66583bdc71
 * Version: 1.0.0
 * Author: Alex Moise
 * Author URI: http://moise.pro
 */

function my_pmpro_mailchimp_listsubscribe_fields($fields, $user)
{
	if(!function_exists('pmpro_getMembershipLevelForUser'))
		return;
	
	$level = pmpro_getMembershipLevelForUser($user->ID);
	if(!empty($level))
		$level_name = $level->name;
	else
		$level_name = "None";

	$new_fields =  array(
      "FNAME" => $user->first_name, 
      "LNAME" => $user->last_name,
	  "LEVEL" => $level_name,
	);

	$fields = array_merge($fields, $new_fields);
	  
	return $fields;
}
add_action('pmpro_mailchimp_listsubscribe_fields', 'my_pmpro_mailchimp_listsubscribe_fields', 10, 2);

?>