Month: May 2025

If you’re running a WooCommerce store in India or working with B2B clients, you may need to collect GST numbers during checkout. In this tutorial, you’ll learn how to add an optional GST number field on the WooCommerce checkout page, save it with the order, and display it in the admin panel as well as in the order confirmation emails.

Step 1: Add GST Number Field to Checkout Page

Use the following code in your theme functions.php file to add a new optional field for the GST number just below the billing fields.

// Add GST Number field to checkout
add_action('woocommerce_after_checkout_billing_form', 'add_gst_field_to_checkout');
function add_gst_field_to_checkout($checkout) {
    echo '<div id="gst_number_field"><h3>' . __('GST Number (Optional)') . '</h3>';

    woocommerce_form_field('gst_number', array(
        'type'        => 'text',
        'class'       => array('form-row-wide'),
        'label'       => __('GST Number'),
        'placeholder' => __('Enter your GST number if applicable'),
        'required'    => false,
    ), $checkout->get_value('gst_number'));

    echo '</div>';
}

Step 2: Save the GST Number to Order Meta

Use the following code in your theme functions.php file to to save the entered GST number into the order’s metadata.

// Save GST number in order meta
add_action('woocommerce_checkout_update_order_meta', 'save_gst_number_order_meta');
function save_gst_number_order_meta($order_id) {
    if (!empty($_POST['gst_number'])) {
        update_post_meta($order_id, '_gst_number', sanitize_text_field($_POST['gst_number']));
    }
}

Step 3: Show GST Number on Admin Order Page

Admins should be able to view the GST number from the WooCommerce dashboard under the order details. Use the following code in your theme functions.php file.

// Show GST number in admin order page
add_action('woocommerce_admin_order_data_after_billing_address', 'display_gst_in_admin_order', 10, 1);
function display_gst_in_admin_order($order) {
    $gst_number = get_post_meta($order->get_id(), '_gst_number', true);
    if (!empty($gst_number)) {
        echo '<p><strong>' . __('GST Number') . ':</strong> ' . esc_html($gst_number) . '</p>';
    }
}

Step 4: Show GST Number in Order Emails

To include the GST number in the order emails (for both admin and customer), below the billing address section, add the following code in your theme functions.php file.

// Add GST number to emails below billing address
add_filter('woocommerce_email_customer_details_fields', 'add_gst_to_order_email', 10, 3);
function add_gst_to_order_email($fields, $sent_to_admin, $order) {
    $gst_number = get_post_meta($order->get_id(), '_gst_number', true);
    if (!empty($gst_number)) {
        $fields['gst_number'] = array(
            'label' => __('GST Number'),
            'value' => $gst_number,
        );
    }
    return $fields;
}

Note: Always test this on a staging site before applying to a live WooCommerce store. If you use custom themes or plugins that modify the checkout or email templates, adjust the code accordingly.

Plugin version of the same codes is also available on Github.

If you’re running a WooCommerce store and want to connect your products to Facebook Catalogue or Google Merchant Center, you usually rely on a plugin. However, plugins can add bloat, slow down your website, or offer limited control.

This guide shows you how to generate a dynamic XML product feed from WooCommerce without installing any plugin. The feed is fully compatible with Facebook Commerce Manager and Google Shopping, supports both simple and variable products, and includes custom attributes like size, colour, and more.Why Build Your Own Feed?

Why build your own feed?

• No need for extra plugins
• Full control over structure and attributes
• Supports all WooCommerce product types
• Dynamically includes all variation attributes
• Can be used for Facebook, Google, or any XML-based product platform

Step 1: Create the XML feed file

Create a new file in your website root directory name it as product-feed-xml.php. Paste the following code inside it.

<?php
require_once('wp-load.php');
ob_clean(); // Clean any prior output to prevent XML errors

header('Content-Type: application/xml; charset=utf-8');

echo '<?xml version="1.0" encoding="UTF-8"?>';
?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">
<channel>
<title>Your Store Feed</title>
<link><?php echo esc_url(site_url()); ?></link>
<description>WooCommerce Product Feed</description>

<?php
$args = [
'post_type'      => ['product', 'product_variation'],
'post_status'    => 'publish',
'posts_per_page' => -1
];

$loop = new WP_Query($args);

if ($loop->have_posts()) {
while ($loop->have_posts()) {
$loop->the_post();
$product = wc_get_product(get_the_ID());

if (!$product || !$product->is_visible()) continue;

$is_variation = $product->is_type('variation');
$parent_id = $is_variation ? $product->get_parent_id() : $product->get_id();
$parent = wc_get_product($parent_id);

// Prices
$currency = get_woocommerce_currency();
$regular_price = $product->get_regular_price();
$sale_price = $product->get_sale_price();
$price = $regular_price ?: $sale_price;

if (!$price) continue; // skip product with no price

// Other fields
$id = $product->get_id();
$title = $product->get_name();
$description = strip_tags($parent->get_short_description() ?: $parent->get_description());
$availability = $product->is_in_stock() ? 'in stock' : 'out of stock';
$condition = 'new';
$link = get_permalink($parent_id);
$image = wp_get_attachment_url($product->get_image_id() ?: $parent->get_image_id());
$category_list = wp_get_post_terms($parent_id, 'product_cat', ['fields' => 'names']);
$product_type = implode(" > ", $category_list);
$item_group_id = $is_variation ? $parent_id : '';
$brand = 'Your Brand'; // Customize if needed
?>
<item>
<g:id><?php echo $id; ?></g:id>
<title><![CDATA[<?php echo $title; ?>]]></title>
<description><![CDATA[<?php echo $description; ?>]]></description>
<link><?php echo esc_url($link); ?></link>
<g:image_link><?php echo esc_url($image); ?></g:image_link>
<g:availability><?php echo $availability; ?></g:availability>
<g:condition><?php echo $condition; ?></g:condition>
<g:price><?php echo number_format($price, 2); ?> <?php echo $currency; ?></g:price>
<?php if ($sale_price): ?>
<g:sale_price><?php echo number_format($sale_price, 2); ?> <?php echo $currency; ?></g:sale_price>
<?php endif; ?>
<g:brand><?php echo esc_html($brand); ?></g:brand>
<g:product_type><![CDATA[<?php echo $product_type; ?>]]></g:product_type>
<?php if ($item_group_id): ?>
<g:item_group_id><?php echo $item_group_id; ?></g:item_group_id>
<?php endif; ?>

<?php
// Output all variation attributes dynamically
$attributes = $product->get_attributes();
foreach ($attributes as $attribute_name => $attribute) {
$label = wc_attribute_label($attribute_name);
$value = $product->get_attribute($attribute_name);
if (!empty($value)) {
$tag_name = strtolower(preg_replace('/[^a-z0-9_]/i', '_', $label));
echo "    <g:" . esc_html($tag_name) . ">" . esc_html($value) . "</g:" . esc_html($tag_name) . ">\n";
}
}
?>
</item>
<?php
}
}
wp_reset_postdata();
?>
</channel>
</rss>

Step 2: Access and test the feed

Visit: https://yourdomain.com/product-feed-xml.php

You’ll see a fully structured XML file that can be submitted to:

• Facebook Commerce Manager
• Google Merchant Center

You can schedule Facebook or Google to fetch your feed daily using the public feed URL: https://yourdomain.com/product-feed-xml.php and you do not need to manually upload a CSV or XML file.