Fraud Prevention: How to limit orders in WooCommerce by IP

Now there are plugins out there that can do this sort of thing, but it’s such an easy thing to DIY, I figured I share my strategy. For ease of use you may copy/paste these snippets into your functions.php file, or copy and paste this code into your own plugin.

In the code below you may want to customize two items:

1. The Time period in which to count orders – by default this script uses 24 hours, or 86400 seconds.
2. The limit you’d like to cap out at – by default this limit is 5 orders per IP for the time period defined above.

add_action('woocommerce_checkout_process', function () {
    
    $limit = 5;

    $recentOrdersForIP = wc_get_orders(array(
        'date_created'        => '>=' . (time() - 86400), // 1 day in seconds. Edit as you require.
        'customer_ip_address' => WC_Geolocation::get_ip_address(),
        'paginate'            => true  // adds a total field to the results
    ));

    if($recentOrdersForIP->total >  $limit ) {
        wc_add_notice('Sorry, there have been too many orders placed in a short period of time. Please return later.', 'error');
    }

}, 10, 0);