Add IP to WooCommerce email footer

add_ip_to_wc_email.php

<?php
add_filter('woocommerce_email_footer_text','add_ip_to_email_footer', 10, 1);

function add_ip_to_email_footer( $footer ){

    return $footer . ' IP: ' . getRealIPAddress();

}

function getRealIPAddress(){
   if (!empty($_SERVER['HTTP_CLIENT_IP'])){
        $remote_ip =$_SERVER['HTTP_CLIENT_IP'];
   }elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
        $remote_ip =$_SERVER['HTTP_X_FORWARDED_FOR'];
   }else{
       $remote_ip =$_SERVER['REMOTE_ADDR'];
   }
   return $remote_ip;
}

OK, I give up. I tried putting this in function.php and in the actual woocommerce/emails/customer-new-account.php file... and it doesn't display anything.

Also tried leaving the function in functions.php and dropping the filter into the template... that didn't seem to do anything either.

Weird. The filter name in the code doesn't match the docs. Fixed it -- grab the new gist and put it in functions.php.

OK, this works perfectly. Here's the screenshot:
https://www.evernote.com/shard/s10/sh/00d74c4c-998e-4164-bacd-28565a753ac5/49b2a2486cdec5777cf6fff82ca655aa