Discount Code for Members Only

pmpro-discount-code-for-membersonly.php

<?php   // do not copy this line.
/**
 * This recipe does allows you to make a discount code for existing members only.
 * 
 * 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/
 */

function my_pmpro_check_discount_code($okay, $dbcode, $level_id, $code)
{
	if ( strtolower( $code ) == "YOURCODEHERE" && ! pmpro_hasMembershipLevel() ) {
		return 'You must be a member to use that discount code.';
	}
	return $okay;
}
add_filter('pmpro_check_discount_code', 'my_pmpro_check_discount_code', 10, 4);