Fortnox - Project code

functions.php

<?php

/**
 * @snippet       WooCommerce -Fortnox - Set Project
 * @author        Redlight Media AB / Christopher Hedqvist
 * @compatible    WooCommerce 4.1.1
 */
function redlight_fortnox_order_project( $orderData, $order_id) {
    switch( get_site_url() ){
      case 'https://www.example.com':
         $orderData['Order']['Project'] = 'PROJEKT1';
        break;
      case 'https://www.mydomain.com':
         $orderData['Order']['Project'] = 'PROJEKT2';
        break;
      case 'https://www.domain.com':
         $orderData['Order']['Project'] = 'PROJEKT3';
        break;
    }
   
    
    return $orderData;
}
add_filter('obj_fortnox_order_data', 'redlight_fortnox_order_project', 10, 2 );