WooCommerce: display text instead of raw checkbox value email

I have successfully setup some custom fields on checkout and it all works fine.

I have a checkbox as one of the fields, my_gift_wrap_checkbox, and I managed to write code to display text in the orders page (‘yes please!‘ or ‘no thank you‘) instead of a simple blank or 1 if it is checked or not.

I can’t figure out how to achieve the same in the email code. My code is:

/**
 * Add the field to order emails
 **/
add_filter('woocommerce_email_order_meta_keys', 'my_woocommerce_email_order_meta_keys');

function my_woocommerce_email_order_meta_keys( $keys ) {
    $keys['Gift wrap?'] = 'my_gift_wrap_checkbox';
    $keys['Gift wrap instructions'] = 'my_gift_wrap_field';
    return $keys;
}

Right now:

• If it’s checked, I get Gift wrap?: 1
  • I want Gift wrap?: Yes please!
• If it’s not checked, it shows Gift wrap?:
  • I want Gift wrap?: No thank you.

Try this instead:

add_action( "woocommerce_email_after_order_table", "my_woocommerce_email_after_order_table", 10, 1);

function my_woocommerce_email_after_order_table( $order ) {
    $my_gift_wrap_checkbox = get_post_meta( $order->id, "my_gift_wrap_checkbox", true );
    $gift_wrap = $my_gift_wrap_checkbox ? 'Yes please!' : 'No thank you.';

    echo '<p><strong>Gift wrap?: </strong>' . $gift_wrap . '</p>';

    if ( $my_gift_wrap_checkbox ) {
        echo '<p><strong>Gift wrap instructions: </strong>' . get_post_meta( $order->id, "my_gift_wrap_field", true ) . '</p>';
    }

}