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>'; } } }