pmpro-add-display-name-as-user-table-field.php

<?php
/**
 * Add the display_name field to the wp_users table.
 *
 * 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/
 */
// Set display_name field to be saved in the wp_user table
function my_pmpro_add_display_name_as_user_table_field( $fields_array ) {
	$fields_array[] = 'display_name';
	return $fields_array;
}
add_filter( 'pmprorh_user_table_fields', 'my_pmpro_add_display_name_as_user_table_field' );