Code-Snippets-Functions/Execute a function on a child site/WooCommerce/update-user-role-after-order-for-a-free-item.txt

add_action( 'woocommerce_order_status_processing', 'change_role_on_purchase', 10, 2 );
add_action( 'woocommerce_order_status_completed', 'change_role_on_purchase', 10, 2 );
function change_role_on_purchase( $order_id, $order ) {
    $user = $order->get_user(); // Get the WP_User Object

    // Loop through order line items
    foreach ( $order->get_items() as $item ) {
        $product_id = $item->get_product_id();
        $variation_id = $item->get_variation_id();

        if ( $user && in_array('13874904', [$product_id , $variation_id]) ) {
            // Set user as paying customer if not set yet
            wc_paying_customer( $order_id );
            // Check for "subscriber" user role and replace it
            if ( wc_user_has_role( $user, 'subscriber' ) ) {
                $user->set_role( 'special_subscriber' );
            }
            break; // Stop the loop
        }
    }
}