public static function show_tracking_number_on_view_order_page($order_id)
{
error_log("show_tracking_number_on_view_order_page");
$order = wc_get_order($order_id);
if ($order->status == 'completed') {
$order_label = new WC_Order_Shipping_Label($order);
$tracking_number = $order_label->tracking_number();
if (!empty($tracking_number)) {
$tracking_url = $order_label->track_package_link();
echo '<h2>Tracking Information</h2>';
echo '<p>';
echo ' <strong>Service: </strong>FedEx<br />';
echo ' <strong>Tracking Number: </strong>' . '<a href="' . $tracking_url . '">' . $tracking_number . '</a>';
echo '</p>';
}
}
}
