woocommerce_update_order action-hook . WC 1.0

Usage

add_action( 'woocommerce_update_order', 'action_function_name_1200' );
function action_function_name_1200( $order_id ){
	// action...
}

$order_id

-

Where the hook is called

do_action( 'woocommerce_update_order', $order->get_id() );

do_action( 'woocommerce_update_order', $order->get_id() );

do_action( 'woocommerce_update_order', $order->get_id(), $order );

Where in WP core the hook is used WooCommerce