I'm adding extra fields to the checkout page in WooCommerce, I can add basic fields like a text box, but need to add a (multi) select box, where the user can choose multiple items. I've figured out how to add a select box through code, like this: add_action('woocommerce_after_order_notes', 'my_custom_checkout_field'); function my_custom_checkout_field( $checkout ) { echo '<div id="my_custom_checkout_field"><h3>'.__('My Field').'</h3>';...
Originally asked by Aaron Cruz on Stack Exchange (stackoverflow) (CC BY-SA 3.0).
