Customizing Woocommerce New Order email notification based on shipping method

Question

How can I edit the admin-new-order.php WooCommerce template to send conditionally some custom customer details based on shipping method?

For example (for New Order email notification):

• If the Order Shipping method is flat rate, I want to add some custom fields information to the customer details.
• If the Order shipping method is NOT flat rate, I don't want custom fields info to be displayed.

Or maybe there's some snippet that goes in function.php for this?

Answer 1

You can use a custom function hooked in any of this hooks (tuning the hook priority):

• woocommerce_email_order_details
• woocommerce_email_order_meta
• woocommerce_email_customer_details

Here it is an example of hooked code (instead of overriding the template):

add_action ('woocommerce_email_customer_details', 'custom_email_customer_details', 15, 4);
function custom_email_customer_details( $order, $sent_to_admin, $plain_text, $email ){

    // Only for "New Order" email notification
    if ( 'new_order' != $email->id ) return;

    // Only "Flat Rate" Shipping Method
    if ( $order->has_shipping_method('flat_rate') ){
        $order_id = $order->get_id(); // The Order ID

        // Test output
        echo "<p>Message: The Order ID is $order_id</p>";
        echo '<p>Custom field: '. get_post_meta( $order_id, '_recorded_sales', true ) .'</p>';
    }
}

The hook priority here is 15, so it comes after the customer details.

Code goes in function.php file of your active child theme (or theme) or also in any plugin file.

This code is tested and works.