Customizing WooCommerce Cart Pages Without Plugins

Adding custom fields to the WooCommerce cart page can be a useful feature for generating additional information from your customers. While plugins offer a quick and easy solution, modifying your theme’s code directly can provide more flexibility and control. This guide walks you through the necessary steps to add a custom field without using a plugin.

Step 1: Add the Custom Field

The first step is to add the custom field to the cart page. You can do this by utilizing the woocommerce_cart_collaterals action hook. Create or edit your theme’s functions file () to add the following code:

add_action('woocommerce_cart_collaterals', 'add_custom_cart_field');
function add_custom_cart_field() {
    echo divlabel for' . esc_attr('custom_field') . 'Custom Field/labelinput typetext id' . esc_attr('custom_field') . ' name' . esc_attr('custom_field') . ' value//div;
}

Step 2: Save the Custom Field Data

Next, you need to save the data entered in the custom field. Use the woocommerce_cart_updated action hook to store the field value in the session:

add_action('woocommerce_cart_updated', 'save_custom_cart_field');
function save_custom_cart_field() {
    if (isset($_POST['custom_field'])) {
        WC()->session->set('custom_field', sanitize_text_field($_POST['custom_field']));
    }
}

Step 3: Display the Custom Field Value in the Cart

To display the saved custom field value in the cart totals, use the woocommerce_cart_totals_after_order_total action hook:

add_action('woocommerce_cart_totals_after_order_total', 'display_custom_cart_field_value');
function display_custom_cart_field_value() {
    $custom_field_value  WC()->session->get('custom_field');
    if ($custom_field_value) {
        echo trthCustom Field:/thtd . esc_html($custom_field_value) . /td/tr;
    }
}

Step 4: Include Custom Field in Checkout Process

If you want the custom field to be included in the checkout process and saved as order meta data, use the woocommerce_checkout_create_order action hook:

add_action('woocommerce_checkout_create_order', 'add_custom_field_to_order', 10, 2);
function add_custom_field_to_order($order, $data) {
    if (WC()->session->get('custom_field')) {
        $order->update_meta_data('Custom Field', WC()->session->get('custom_field'));
    }
}

Summary

To summarize, follow these steps to add a custom field without using a plugin:

Add the custom field using the woocommerce_cart_collaterals hook. Save the custom field data using the woocommerce_cart_updated hook. Display the saved custom field value using the woocommerce_cart_totals_after_order_total hook. Include the custom field in the checkout process and the order meta using the woocommerce_checkout_create_order hook.

Before making any changes, be sure to back up your theme’s file. After implementing these changes, test the cart functionality to ensure everything works as expected.

By following this guide, you can enhance the functionality of your WooCommerce store without relying on additional plugins, providing a more personalized experience for your customers.

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