Woocommerce, adding cart data on success page for google tag manager.php

<?php
add_action('woocommerce_thankyou', 'order_received', 10, 1);

function order_received($order_id)
{
  $order = wc_get_order($order_id);
  $order_data = $order->get_data();
  $quantity = $order->get_item_count();

  // Needed variables
  $line_items = $order_data['line_items'];
  $order_total = $order_data['total'];
  $product_ids = array();
  $product_quantities = array();

  foreach ($line_items as $prod) {
    array_push($product_ids, $prod->get_product_id('view'));
    array_push($product_quantities, $prod->get_quantity('view'));
  }
?>
  <script>
    window.dataLayer = window.dataLayer || [];
    window.dataLayer.push({
      cart: {
        productIds: <?php echo json_encode($product_ids) ?>,
        productQuantities: <?php echo json_encode($product_quantities) ?>,
        productsLength: <?php echo $quantity ?>,
        value: <?php echo $order_total ?>,
      }
    });
  </script>
<?php
}