Hook woocommerce_thankyou doesn't receive order - php

Question

In WooCommerce, I am using a custom function hooked in woocommerce_thankyou action hook, to execute some code after a payment has been made. The hook works but it seems that I can't get the order.
This is the simplified code. By the looks of it $order isn't found:
add_action( 'woocommerce_thankyou', 'afterorder', 10, 1 );
function afterorder($order_id) {
//$order = new WC_Order($order_id);
$order = wc_get_order($order_id);
$order_items = $order->get_items();
$order_comment_list = explode('\n', $order->customer_message);
$payment_method = $order->payment_method_title;
foreach( $order_items as $product ) {
$order->add_order_note('order for '.$product['name'].' received', false);
}
}
What am I missing here?

Answer 1

Your code is a partially outdated and with some errors since WooCommerce 3+. Order line items are now WC_Order_Item_Product class objects.
For Order "line items" you need to use WC_Order_Item_Product available methods to get the related data, like the corresponding product title:
add_action( 'woocommerce_thankyou', 'afterorder', 10, 1 );
function afterorder( $order_id ) {
// The WC_Order object
$order = wc_get_order($order_id);
$order_comment_list = explode( '\n', $order->get_customer_note() ); // Changed
$payment_method = $order->get_payment_method_title(); // Changed
foreach( $order->get_items() as $line_item ) {
// The WC_Product object
$product = $line_item->get_product(); // Added
$note = 'order for '.$product->get_title().' received';// Changed
$order->add_order_note( $note, false );
}
}
Code goes in function.php file of your active child theme (or active theme) or in any plugin file.
You should check may be the WC_Order method add_order_note() to see if you have correctly set it as you want.