Remove payment plans from an Addon Package checkout.

remove_payment_plans_for_addon_package.php

<?php
/**
 * This recipe removes payment plans from the PMPro checkout page if
 * checkout is for an Addon Package.
 *
 * 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_for_addon_package() {
	global $pmpro_pages, $post;
	// Is payment plans  and addon packages active?
	if ( ! function_exists( 'pmpropp_get_plan' ) || ! function_exists( 'pmproap_hasAccess')) {
		return;
	}

	// Are we on checkout for an Addon Package?
	if ( isset( $_REQUEST['ap'] ) && ! empty( $_REQUEST['ap'] ) && ( is_page( $pmpro_pages['checkout'] ) || strpos( $post->post_content, '[pmpro_checkout' ) !== false ) ) {
		?>
		<script type="text/javascript">
			jQuery(document).ready(function () {
				jQuery("#pmpropp_select_payment_plan").remove();
			});
		</script>
		<?php
	}
}
add_action( 'wp_footer', 'remove_payment_plans_for_addon_package' );