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I try do something similar to ‘product addons’, but manually. I would have few simple products, that have to be as companions. Their ids will be the same. I want to make them as checkboxes, with photo, name and price. If checkbox is checked – that product has to add to cart together with main on the product page. That’s a code, already tweaked by gpt

// Function to display checkboxes for additional products
function display_additional_products_checkboxes() {
    $additional_products_ids = array(220, 222, 224, 226); // Replace with your product IDs

    echo '<div class="additional-products">';
    echo '<h3>Additional Products</h3>';

    foreach ($additional_products_ids as $product_id) {
        $additional_product = wc_get_product($product_id);
        if ($additional_product) {
            $product_name = $additional_product->get_name();
            $product_price = $additional_product->get_price_html();
            $product_id_sanitized = sanitize_title($additional_product->get_slug());

            echo '<div class="additional-product">';
            echo '<label for="additional_product_' . $product_id_sanitized . '">';
            echo '<input type="checkbox" name="additional_products[]" id="additional_product_' . $product_id_sanitized . '" value="' . $product_id . '">';
            echo $product_name . ' - ' . $product_price;
            echo '</label>';
            echo '</div>';
        }
    }

    echo '</div>';
}
add_action('woocommerce_before_add_to_cart_button', 'display_additional_products_checkboxes');

// Function to process additional products checkboxes
function add_additional_products_to_cart($cart_item_data, $product_id, $variation_id) {
    if (isset($_POST['additional_products']) && !empty($_POST['additional_products'])) {
        $additional_products = wc_clean(wp_unslash($_POST['additional_products']));
        $cart_item_data['additional_products'] = $additional_products;
    }
    return $cart_item_data;
}
add_filter('woocommerce_add_cart_item_data', 'add_additional_products_to_cart', 10, 3);

// Function to display additional products in cart
function display_additional_products_in_cart($item_data, $cart_item) {
    if (isset($cart_item['additional_products']) && !empty($cart_item['additional_products'])) {
        $additional_products = $cart_item['additional_products'];
        $additional_products_names = array();

        foreach ($additional_products as $product_id) {
            $product = wc_get_product($product_id);
            if ($product) {
                $additional_products_names[] = $product->get_name();
            } else {
                error_log("Failed to get additional product with ID: $product_id");
            }
        }

        $item_data[] = array(
            'key'   => __('Additional Products', 'woocommerce'),
            'value' => implode(', ', $additional_products_names),
        );
    }

    return $item_data;
}
add_filter('woocommerce_get_item_data', 'display_additional_products_in_cart', 10, 2);

// Function to add additional products to order
function add_additional_products_to_order($item, $cart_item_key, $values, $order) {
    if (isset($values['additional_products']) && !empty($values['additional_products'])) {
        $additional_products = $values['additional_products'];

        foreach ($additional_products as $product_id) {
            $product = wc_get_product($product_id);
            if ($product) {
                $item->add_meta_data(__('Additional Product', 'woocommerce'), $product->get_name());
            } else {
                error_log("Failed to get additional product with ID: $product_id");
            }
        }
    }
}
add_action('woocommerce_checkout_create_order_line_item', 'add_additional_products_to_order', 10, 4);

// Function to add additional products as separate line items in the cart
function add_additional_products_as_separate_items($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) {
    if (isset($cart_item_data['additional_products']) && !empty($cart_item_data['additional_products'])) {
        if (!isset(WC()->session->additional_products_added)) {
            WC()->session->set('additional_products_added', array());
        }
        $processed = WC()->session->get('additional_products_added');

        $additional_products = $cart_item_data['additional_products'];

        foreach ($additional_products as $additional_product_id) {
            if (!in_array($additional_product_id, $processed)) {
                $additional_product = wc_get_product($additional_product_id);
                if ($additional_product) {
                    error_log("Adding additional product to cart: " . $additional_product->get_name());
                    WC()->cart->add_to_cart($additional_product_id);
                    $processed[] = $additional_product_id; // Mark this additional product as processed
                } else {
                    error_log("Failed to add additional product with ID: $additional_product_id");
                }
            }
        }

        WC()->session->set('additional_products_added', $processed);
    }
}
add_action('woocommerce_add_to_cart', 'add_additional_products_as_separate_items', 10, 6);

// Clear session data after checkout
function clear_additional_products_session() {
    if (isset(WC()->session->additional_products_added)) {
        WC()->session->__unset('additional_products_added');
    }
}
add_action('woocommerce_checkout_order_processed', 'clear_additional_products_session');

But I still have the same issue, and gpt can’t help – I have it again and again.
Log shows something like

[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One
[25-Jun-2024 04:21:09 UTC] Adding additional product to cart: Present One

Like endless loop. Gpt tried to help with session moment, but it didn’t help. Maybe some human would know better where I’m wrong?

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Danh mục

How to fix adding advanced product to cart together with main product?