WooCommerce get_sku(); on products variations in order

On WooCommerce 3.x this line throws a fatal error:

$product = new WC_Product($item['variation_id']);

Uncaught exception 'Exception' with message 'Invalid Product'.

You can do this:

$sku = get_post_meta( $item['variation_id'], '_sku', true );

Talk about tunnel vision..

 $product_variation_id = $item['variation_id'];
 $product = new WC_Product($item['product_id']);

Solution was switching 'product_id' for my already in place 'variation_id'

$product = new WC_Product($item['variation_id']);

Voila, problem solved !

Working example To get the expected output on $sku i did go for this solution

// Get order data
$order = new WC_Order($order_id);
$items = $order->get_items();

// Loop through ordered items
foreach ($items as $item) {
  $product_name = $item['name'];
  $product_id = $item['product_id'];
  $product_qty = $item['qty'];
  $product_variation_id = $item['variation_id'];

  // Check if product has variation.
  if ($product_variation_id) { 
    $product = new WC_Product($item['variation_id']);
  } else {
    $product = new WC_Product($item['product_id']);
  }

  // Get SKU
  $sku = $product->get_sku();
}