WooCommerce hook after order is updated?

Question

Is there a hook I can use when I make a change to someone's order via the admin (such as their address, or a custom meta field)? I read this question but unfortunately woocommerce_process_shop_order_meta is fired before the order is saved, meaning I have no access to the newly updated data. What I need is to be able to use the new data that is saved to the order.

UPDATE: An issue with using save_post_shop_order is that the meta is updated before this is hit, so I can't compare the previously saved meta value, for example:

$metaArray = $_POST['meta'];

foreach($metaArray as $meta => $key) {
    $metaArr[$key["key"]] = $key["value"];
}

$meta = get_post_meta($order->ID);

if($meta['coverstart'][0] != $metaArr['coverstart']) {
    die("COVER START DATE HAS CHANGED");
}

The die() is never hit, because the script always gets the newly saved value.

Answer 1

Sorry but woocommerce_checkout_update_order_meta is fired after the order is saved… See this extract source code located in WC_Checkout create_order() method:

// Save the order.
$order_id = $order->save(); // <== Order is saved here before

do_action( 'woocommerce_checkout_update_order_meta', $order_id, $data ); <== // The hook

return $order_id;

So in woocommerce_checkout_update_order_meta you can get the saved order data:

• by retrieving the WC_Order object from the $order_id argument and using all methods on it.
• or using get_post_meta() on with the $order_id argument to get the data saved in wp_postmeta database table.

Then you can update the data with update_post_meta() function…

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You can even use woocommerce_checkout_create_order before the data is saved…

You will be able to get the data from the $order argument using all available methods for the WC_Order class (CRUD getters methods).

You will be able to alter this data and saving it using the CRUD setters methods…

Some examples in stackOverFlow

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If you need to do that after the order process the hooks to be used can be:

• woocommerce_new_order (on newly created order event)
• woocommerce_thankyou (on order received page)
• woocommerce_order_status_changed (on order status changing event)

And may be some others…

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To alter the data when order is saved in backend, you will use save_post_shop_order that has 3 arguments: $post_id, $post and $update…