How to add a user custom field into Woocommerce emails?

To add a custom field to WooCommerce emails, you can use the woocommerce_email_order_meta_fields filter hook. This hook allows you to add custom fields to the order emails.

Here’s a step-by-step guide:

1. First, you need to add the custom field to the order meta. This is typically done when the order is created or updated. Here’s an example of how you might do this:

add_action('woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_order_meta');

function my_custom_checkout_field_update_order_meta($order_id) {
    if ($_POST['my_field_name']) update_post_meta($order_id, 'My Field', esc_attr($_POST['my_field_name']));
}

In this example, my_field_name is the name of the input field in your form, and ‘My Field’ is the name you’re giving to this custom field in the order meta.

2. Next, you need to add the custom field to the email. You can do this with the woocommerce_email_order_meta_fields filter hook:

add_filter('woocommerce_email_order_meta_fields', 'custom_woocommerce_email_order_meta_fields', 10, 3);

function custom_woocommerce_email_order_meta_fields($fields, $sent_to_admin, $order) {
    $fields['meta_key'] = array(
        'label' => __('My Field'),
        'value' => get_post_meta($order->id, 'My Field', true),
    );
    return $fields;
}

In this example, ‘My Field’ is the name of the custom field you added to the order meta, and ‘My Field’ is the label that will be used in the email.

Remember to replace ‘My Field’ and ‘my_field_name’ with the actual name of your custom field. Also, this code should be added to your theme’s functions.php file or a custom plugin.

Please note that this is a basic example. Depending on your needs, you might need to adjust this code to fit your specific situation. Always test changes in a staging environment before applying them to your live site.

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