Code-Snippets-Functions/Execute a function on a child site/WooCommerce/display-custom-text-under-products-on-checkout-page-based-on-shipping-class.txt

add_filter( 'woocommerce_cart_item_name', 'bks_custom_text_cart_item_name', 10, 3 );
function bks_custom_text_cart_item_name( $item_name, $cart_item, $cart_item_key ) {

    if( ! ( is_cart() || is_checkout()) ) // CHANGE HERE
        return $item_name;


    $shipping_class_1 = '5-gallon';
    $shipping_class_2 = '10-gallon';

    $shipping_class   = $cart_item['data']->get_shipping_class();

    if( $shipping_class === $shipping_class_1 ) {
        $item_name .= '<br /><div class="item-shipping-class">' . __("Please call confirm shipping rates", "woocommerce") . '</div>';
    }
    elseif( $shipping_class === $shipping_class_2 ) {
        $item_name .= '<br /><div class="item-shipping-class">' . __("Some different message…", "woocommerce") . '</div>';
    }

    return $item_name;
}