Remove PMPro Gift Aid text from checkout page for specified levels in the $no_gift_aid_level_ids variable.

remove-gift-aid-text-from-checkout-page.php

<?php
/**
 * Remove the gift aid text from the checkout page for specified membership levels.
 *
 * 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_pmproga_remove_level_cost_text() {
	global $pmpro_level, $pmpro_pages;

	$no_gift_aid_level_ids = array( 2, 3 );

	// bail if if not on checkout page or gift aid not active
	if ( ! function_exists( 'pmproga_pmpro_checkout_after_level_cost' ) || ! is_page( $pmpro_pages['checkout'] ) ) {
		return;
	}

	if ( ! empty( $pmpro_level ) ) {
		$level_id = $pmpro_level->id;
	} elseif ( ! empty( $_REQUEST['level'] ) ) {
		$level_id = $_REQUEST['level'];
	} else {
		$level_id = 0;
	}

	if ( in_array( $level_id, $no_gift_aid_level_ids ) ) {
		// remove level cost text
		remove_action( 'pmpro_checkout_after_level_cost', 'pmproga_pmpro_checkout_after_level_cost' );
	}
}
add_action( 'wp', 'my_pmproga_remove_level_cost_text' );