Easy Digital Downloads - add a {ip_address} email tag

gistfile1.php

<?php

/**
 * Add a {ip_address} tag for use in either the purchase receipt email or admin notification emails
 */
if ( function_exists( 'edd_add_email_tag' ) ) {
	edd_add_email_tag( 'ip_address', 'Customer\'s IP Address', 'sumobi_edd_email_tag_ip_address' );
}
 
/**
 * The {ip_address} email tag
 */
function sumobi_edd_email_tag_ip_address( $payment_id ) {
	return edd_get_payment_user_ip( $payment_id );
}