Function to copy a WooCommerce order

Updated for H.P.O.S. compatibility on July 20th, 2024.

function ccom_duplicate_order( $original_order_id ) {

	// Load Original Order
	$original_order = wc_get_order( $original_order_id );
	$user_id = $original_order->get_user_id();

	// Setup Cart
	WC()->frontend_includes();
	WC()->session = new WC_Session_Handler();
	WC()->session->init();
	WC()->customer = new WC_Customer( $user_id, true );
	WC()->cart = new WC_Cart();

	// Setup New Order
	$checkout = WC()->checkout();
	WC()->cart->calculate_totals();
	$order_id = $checkout->create_order( [ ] );
	$order = wc_get_order( $order_id );
	$order->update_meta_data( '_customer_user', $original_order->get_meta( '_order_shipping' ) );

	// Header
	$order->update_meta_data( '_order_shipping', $original_order->get_meta( '_order_shipping' ) );
	$order->update_meta_data( '_order_discount', $original_order->get_meta( '_order_discount' ) );
	$order->update_meta_data( '_cart_discount', $original_order->get_meta( '_cart_discount' ) );
	$order->update_meta_data( '_order_tax', $original_order->get_meta( '_order_tax' ) );
	$order->update_meta_data( '_order_shipping_tax', $original_order->get_meta( '_order_shipping_tax' ) );
	$order->update_meta_data( '_order_total', $original_order->get_meta( '_order_total' ) );
	$order->update_meta_data( '_order_key', 'wc_' . apply_filters( 'woocommerce_generate_order_key', uniqid( 'order_' ) ) );
	$order->update_meta_data( '_customer_user', $original_order->get_meta( '_customer_user' ) );
	$order->update_meta_data( '_order_currency', $original_order->get_meta( '_order_currency' ) );
	$order->update_meta_data( '_prices_include_tax', $original_order->get_meta( '_prices_include_tax' ) );
	$order->update_meta_data( '_customer_ip_address', $original_order->get_meta( '_customer_ip_address' ) );
	$order->update_meta_data( '_customer_user_agent', $original_order->get_meta( '_customer_user_agent' ) );

	// Billing
	$order->update_meta_data( '_billing_city', $original_order->get_meta( '_billing_city' ) );
	$order->update_meta_data( '_billing_state', $original_order->get_meta( '_billing_state' ) );
	$order->update_meta_data( '_billing_postcode', $original_order->get_meta( '_billing_postcode' ) );
	$order->update_meta_data( '_billing_email', $original_order->get_meta( '_billing_email' ) );
	$order->update_meta_data( '_billing_phone', $original_order->get_meta( '_billing_phone' ) );
	$order->update_meta_data( '_billing_address_1', $original_order->get_meta( '_billing_address_1' ) );
	$order->update_meta_data( '_billing_address_2', $original_order->get_meta( '_billing_address_2' ) );
	$order->update_meta_data( '_billing_country', $original_order->get_meta( '_billing_country' ) );
	$order->update_meta_data( '_billing_first_name', $original_order->get_meta( '_billing_first_name' ) );
	$order->update_meta_data( '_billing_last_name', $original_order->get_meta( '_billing_last_name' ) );
	$order->update_meta_data( '_billing_company', $original_order->get_meta( '_billing_company' ) );

	// Shipping
	$order->update_meta_data( '_shipping_country', $original_order->get_meta( '_shipping_country' ) );
	$order->update_meta_data( '_shipping_first_name', $original_order->get_meta( '_shipping_first_name' ) );
	$order->update_meta_data( '_shipping_last_name', $original_order->get_meta( '_shipping_last_name' ) );
	$order->update_meta_data( '_shipping_company', $original_order->get_meta( '_shipping_company' ) );
	$order->update_meta_data( '_shipping_address_1', $original_order->get_meta( '_shipping_address_1' ) );
	$order->update_meta_data( '_shipping_address_2', $original_order->get_meta( '_shipping_address_2' ) );
	$order->update_meta_data( '_shipping_city', $original_order->get_meta( '_shipping_city' ) );
	$order->update_meta_data( '_shipping_state', $original_order->get_meta( '_shipping_state' ) );
	$order->update_meta_data( '_shipping_postcode', $original_order->get_meta( '_shipping_postcode' ) );

	// Shipping Items
	$original_order_shipping_items = $original_order->get_items( 'shipping' );
	foreach( $original_order_shipping_items as $original_order_shipping_item ) {
		$item_id = wc_add_order_item( $order_id, array(
			'order_item_name' => $original_order_shipping_item['name'],
			'order_item_type' => 'shipping'
		) );
		if( $item_id ) {
			wc_add_order_item_meta( $item_id, 'method_id', $original_order_shipping_item['method_id'] );
			wc_add_order_item_meta( $item_id, 'cost', wc_format_decimal( $original_order_shipping_item['cost'] ) );
		}
	}

	// Coupons
	$original_order_coupons = $original_order->get_items( 'coupon' );
	foreach( $original_order_coupons as $original_order_coupon ) {
		$item_id = wc_add_order_item( $order_id, array(
			'order_item_name' => $original_order_coupon['name'],
			'order_item_type' => 'coupon'
		) );
		if ( $item_id ) {
			wc_add_order_item_meta( $item_id, 'discount_amount', $original_order_coupon['discount_amount'] );
		}
	}

	// Payment
	$order->update_meta_data( '_payment_method', $original_order->get_meta( '_payment_method' ) );
	$order->update_meta_data( '_payment_method_title', $original_order->get_meta( '_payment_method_title' ) );
	$order->update_meta_data( 'Transaction ID', $original_order->get_meta( 'Transaction ID' ) );

	// Line Items
	foreach( $original_order->get_items() as $originalOrderItem ) {
		$itemName = $originalOrderItem['name'];
		$qty = $originalOrderItem['qty'];
		$lineTotal = $originalOrderItem['line_total'];
		$lineTax = $originalOrderItem['line_tax'];
		$productID = $originalOrderItem['product_id'];
		$item_id = wc_add_order_item( $order_id, [
				'order_item_name' => $itemName,
				'order_item_type' => 'line_item'
		] );
		wc_add_order_item_meta( $item_id, '_qty', $qty );
		wc_add_order_item_meta( $item_id, '_tax_class', $originalOrderItem['tax_class'] );
		wc_add_order_item_meta( $item_id, '_product_id', $productID );
		wc_add_order_item_meta( $item_id, '_variation_id', $originalOrderItem['variation_id'] );
		wc_add_order_item_meta( $item_id, '_line_subtotal', wc_format_decimal( $lineTotal ) );
		wc_add_order_item_meta( $item_id, '_line_total', wc_format_decimal( $lineTotal ) );
		wc_add_order_item_meta( $item_id, '_line_tax', wc_format_decimal( $lineTax ) );
		wc_add_order_item_meta( $item_id, '_line_subtotal_tax', wc_format_decimal( $originalOrderItem['line_subtotal_tax'] ) );
	}

	// Close New Order
    $order->save();
	$order->calculate_totals();
	$order->payment_complete();
	$order->update_status( 'processing' );

	// Note
	$message = sprintf(
		'This order was duplicated from order %d.',
		$original_order_id
	);
	$order->add_order_note( $message );

	// Return
	return $order_id;

}

Here’s an example of using this custom function in a Run Once Code Snippet:

add_action( 'admin_notices', function() {

	$original_order_id = 5703489;
	$order_id = ccom_duplicate_order( $original_order_id );
	wp_admin_notice(
		sprintf(
			'Successfully copied order %d to order %d',
			$original_order_id,
			$order_id
		),
		[ 'type' => 'success' ]
	);

} );