Change Shipping Package Title

As of WooCommerce 2.6, the package titles are now able to be something more than Shipping #1, Shipping #2, etc… Using a filter, one can change the titles to something more helpful. For example, if you separate your cart into packages based on individual shipping classes, you could title the package after the class itself. The example code below will do just that:

function wc_change_pkg_titles( $current_title, $pkg_id, $package ) {

    // exit if package error
    if( ! isset( $package['contents'] ) || ! is_array( $package['contents'] ) ) return $current_title;

    foreach( $package['contents'] as $key => $item ) {
        $product = $item['data'];
        $shipping_class_id = $product->get_shipping_class_id();
        $shipping_class = get_term( $shipping_class_id );
    }

    return ( $shipping_class ) ? $shipping_class->name : $current_title;
        
}
add_filter( 'woocommerce_shipping_package_name', 'wc_change_pkg_titles', 10, 3 );