pmproan2c_first_name_optional.php

<?php
/**
 * Make the first name optional on the checkout page for the Add Name To Checkout Add On.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
add_filter( 'pmproan2c_first_name_required', '__return_false' );