WooCommerce - order_has_product

order-has-product.php

<?php

/**
 * Order Has Product
 * 
 * Checks a WooCommerce order to see if it contains
 * a given product ID
 * 
 * @param object $order
 * @param int $product_id
 * @return bool
 */
function order_has_product( $order, $product_id ) {
    $items = $order->get_items();
    $has_product = false;

    foreach ( $items as $item ) {
        if ( $item->get_product_id() === $product_id ) {
            $has_product = true;
            break;
        }
    }

    return $has_product;
}