check_shipping_if_gifting.php

<?php
// Check the "shipping to different address" checkbox on the Checkout page if the cart contains a gifted item
add_filter('woocommerce_ship_to_different_address_checked','check_shipping_if_gifting', 11, 1);
function check_shipping_if_gifting($val){
	foreach ( WC()->cart->cart_contents as $key => $item ) {
		if ( '' !== WCSG_Cart::get_recipient_from_cart_item( $item ) ) {
			return true;
		}
	}
	return $val;
}
?>