Autocomplete WooCommerce Orders

bm-woo-autocomplete.php

<?php
/*
 * Plugin Name:  Autocomplete WooCommerce Orders
 * Plugin URI:   https://www.bajorat-media.com
 * Description:  Autocomplete WooCommerce Orders
 * Version:      1.0.1
 * Author:       Bajorat Media
 * Author URI:   https://www.bajorat-media.com
 * License: GPLv2 or later
 * License URI:  https://www.bajorat-media.com
*/


/**
 * Auto Complete all WooCommerce orders.
 */
add_action( 'woocommerce_thankyou', 'bm_woocommerce_auto_complete_order' );
function bm_woocommerce_auto_complete_order( $order_id )
{
    if ( ! $order_id ) {
        return;
    }

    $order = wc_get_order( $order_id );
    $order->update_status( 'completed' );
}