How to Detect Product Categories in WooCommerce Cart

Want to check if a product from a specific category is in the WooCommerce cart? You can do this easily using the woocommerce_before_cart_contents action hook, which triggers before cart items are displayed. Below is a practical example of how to achieve it:

add_action('woocommerce_before_cart_contents', 'check_product_category_in_cart');

function check_product_category_in_cart() {
    $category_slug = 'your-category-slug'; // Replace with your actual category slug
    $category_found = false;

    // Get items from the cart
    $cart_items = WC()->cart->get_cart();

    // Loop through each item
    foreach ($cart_items as $cart_item_key => $cart_item) {
        $product_id = $cart_item['product_id'];

        // Check the category
        if (has_term($category_slug, 'product_cat', $product_id)) {
            $category_found = true;
            break;
        }
    }

    // Display message based on result
    if ($category_found) {
        echo 'The category is in the cart.';
    } else {
        echo 'The category is not in the cart.';
    }
}

Just update 'your-category-slug' to the correct slug for the category you want to target. Add this snippet to your theme’s functions.php or a custom plugin. It will run whenever the cart page loads and inform whether a matching product category is in the cart.