Order API checkout fields

Hi @toddi2303!

Checkout fields are saved as an order meta values, so any $order->get_meta('_<field_name>') should be able to retrieve custom values (mind the underscore at the beginning of the field name).

Alternatively, there’s a class \WPDesk\FCF\Free\Integration\Integrator in our codebase, which provides an API to access fields and its values in specified order. To make use of this class, you need to hook into flexible_checkout_fields/init.

Here’s an example for getting order field value:

add_action(
  'flexible_checkout_fields/init',
  static function ( $integrator ) {
    // Get value of custom field for order #13.
    $field = $integrator->get_field_value( 'custom_field', 13 );
    // ...
  }
);