I am building a WooCommerce web-store with different and I want to get different series of order numbers or invoice numbers based on this thread. I need a similar solution. The codes I've tried: 1st try add_filter( 'woocommerce_order_number', 'change_woocommerce_order_number' ); function change_woocommerce_order_number( $order_id ) { $order = new WC_Order( $order_id ); foreach ( $order->get_items() as $item_key => $item ) $product = $order->get_product_from_item( $item ); $sku = $product->get_sku(); $new_order_id = $sku . $order_id; return $new_order_id; } 2nd try: function change_woocommerce_order_number($order_id) { $order = new WC_Order($order_id); $items = $order->get_items(); $first_item = $items[0]; $product_id = $first_item->get_product_id(); $product = new WC_Product($product_id); $sku = $product->get_sku(); return $sku.$order_id; } add_filter('woocommerce_order_number', 'change_woocommerce_order_number'); Now, whenever I use those code snippets, the checkout page stops working and gives the error "there has been a critical error on this website". I'm a complete novice in regard to custom coding.
Jese Leos
October 20, 2024
Verified user
There are some mistakes in your code attempts and as an order can have multiple products, you need to get the SKU from the first order item (product), to prepend it to the order number. Try the following instead: add_filter( 'woocommerce_order_number', 'custom_wc_order_number', 10, 2 ); function custom_wc_order_number( $order_id, $order ) { $item = current( $order->get_items() ); // Get the first order item $product = $item->get_product(); // Get the WC_Product Object $sku = $product->get_sku(); // Get the SKU from the product if ( $sku ) { return $sku . $order_id; // Prepend the sku to the order number } return $order_id; } It should work.