Removes payment plans from a membership level checkout if a discount code is applied.

remove-payment-plans-if-discount-code-applied.php

<?php
/**
 * This recipe removes payment plans from the PMPro checkout page if a
 * discount code is applied.
 *
 * 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 remove_payment_plans_when_discount_code_applied( $discount_code, $discount_code_id, $level_id, $code_level ) {
	// Is payment plans active?
	if ( ! function_exists( 'pmpropp_get_plan' ) ) {
		return;
	}

	// If a valid discount code is applied, remove payment plans.
	if ( ! empty( $code_level ) ) {
		echo 'jQuery("#pmpropp_select_payment_plan").remove();';
	}
}
add_action( 'pmpro_applydiscountcode_return_js', 'remove_payment_plans_when_discount_code_applied', 10, 4 );