/ Get $order object when you have the ID.
$order = wc_get_order( $order_id );
// Get order key.
$order->get_order_key();
// Get Order Totals $0.00
$order->get_formatted_order_total();
$order->get_cart_tax();
$order->get_currency();
$order->get_discount_tax();
$order->get_discount_to_display();
$order->get_discount_total();
$order->get_fees();
$order->get_formatted_line_subtotal();
$order->get_shipping_tax();
$order->get_shipping_total();
$order->get_subtotal();
$order->get_subtotal_to_display();
$order->get_tax_location();
$order->get_tax_totals();
$order->get_taxes();
$order->get_total();
$order->get_total_discount();
$order->get_total_tax();
$order->get_total_refunded();
$order->get_total_tax_refunded();
$order->get_total_shipping_refunded();
$order->get_item_count_refunded();
$order->get_total_qty_refunded();
$order->get_qty_refunded_for_item();
$order->get_total_refunded_for_item();
$order->get_tax_refunded_for_item();
$order->get_total_tax_refunded_by_rate_id();
$order->get_remaining_refund_amount();
// Get and Loop Over Order Items
foreach ( $order->get_items() as $item_id => $item ) {
$product_id = $item->get_product_id();
$variation_id = $item->get_variation_id();
$product = $item->get_product();
$name = $item->get_name();
$quantity = $item->get_quantity();
$subtotal = $item->get_subtotal();
$total = $item->get_total();
$tax = $item->get_subtotal_tax();
$taxclass = $item->get_tax_class();
$taxstat = $item->get_tax_status();
$allmeta = $item->get_meta_data();
$somemeta = $item->get_meta( '_whatever', true );
$type = $item->get_type();
}
// Other Secondary Items Stuff
$order->get_items_key();
$order->get_items_tax_classes();
$order->get_item_count();
$order->get_item_total();
$order->get_downloadable_items();
// Get Order Lines
$order->get_line_subtotal();
$order->get_line_tax();
$order->get_line_total();
// Get Order Shipping
$order->get_shipping_method();
$order->get_shipping_methods();
$order->get_shipping_to_display();
