$query = $modx->newQuery('modResource');

    $query->select(array(
      'modResource.id as id',
      'modResource.pagetitle as pagetitle',
    ));
    $query->leftJoin('msProduct','msProduct');

    $query->where(array(
      'pagetitle' => $_POST['search'],
      'modResource.id' => 'msProduct.id',
    ));
    $boxes = $modx->getCollection('modResource',$query);
    $output = '';
    //echo "POST- ".$_POST['search'];
    foreach ($resources as $resource) {
      $output .= $resource->get('pagetitle').'
';
    }
    return $output;