get current product

gistfile1.txt

  global $user;
  $cart = commerce_cart_order_load($user->uid);
  if($cart) {
    $line = commerce_line_item_load($cart->commerce_line_items['und'][0]['line_item_id']);
    $product = commerce_product_load($line->commerce_product['und'][0]['product_id']);
    $sku = $product->sku;
    dpm($sku);    
  }