WooCommerce での以前の購入に基づいて製品へのアクセスを制限するにはどうすればよいですか?

function has_bought_items() {
    $bought = false;

    // Specify the product IDs of restricted products
    $prod_arr = array( '21', '67' );

    // Retrieve all customer orders
    $customer_orders = get_posts( array(
        'numberposts' => -1,
        'meta_key' => '_customer_user',
        'meta_value' => get_current_user_id(),
        'post_type' => 'shop_order', // WC orders post type
        'post_status' => 'wc-completed' // Only orders with status "completed"
    ) );

    foreach($customer_orders as $customer_order) {
        // Compatibility for WooCommerce 3+
        $order_id = method_exists( $order, 'get_id' ) ? $order->get_id() : $order->id;
        $order = wc_get_order( $customer_order );

        // Iterate through purchased products in the order
        foreach($order->get_items() as $item) {
            // Compatibility for WC 3+
            if(version_compare(WC_VERSION, '3.0', '<')){
                $product_id = $item['product_id'];
            }else{
                $product_id = $item->get_product_id();
            }

            // Check if any of the designated products were purchased
            if(in_array($product_id, $prod_arr)){
                $bought = true;
            }
        }
    }

    // Return true if a designated product was purchased
    return $bought;
}

// Replace restricted product IDs as needed
$restricted_products = array( '20', '32', '75' );

// Compatibility for WC +3
$product_id = method_exists( $product, 'get_id' ) ? $product->get_id() : $product->id;

// Customer has not purchased a designated product for restricted products
if( !has_bought_items() && in_array( $product_id, $restricted_products ) ) {
    // Display inactive add-to-cart button with custom text
}else{
    // Display normal add-to-cart button
}