gistfile1.txt

$queryGraph = array();
if ($includeBrand) { $queryGraph[] = '"Brand":{}'; }
if ($includeImages) { $queryGraph[] = '"Images":{}'; }
if ($includeOwner) { $queryGraph[] = '"Owner":{}'; }
if ($includeOptions) { $queryGraph[] = '"CamperOptions":{ "Options":{} }'; }
$queryGraph = '{ '.implode(', ',$queryGraph).' }';
//echo '<pre>'.print_r($query->query,true).'</pre>';
$campers = $modx->getCollectionGraph('cmCamper',$queryGraph,$query);