Xpdo custom class

//get filters from the filter table
	function getFilter($filter = ''){
		$select = "SELECT 
					filter,
					value, 
					value_screen
					FROM `filters` 
					WHERE `filter` = '".$filter."' 
					ORDER BY (value*1);
					";				    
		$query = mysql_query($select);
		$result = array();
		if (mysql_numrows($query) == 0) { 
			$location = "Location: ".$modx->makeUrl(intval($modx->config['error_page']));
			header($location);
			exit();
		} else {
			while ($row = mysql_fetch_object($query)) {
			$result[] = $row;
			}
		}
		return $result;
	}

function getFilter($filter = '') {
  $c = $modx->newQuery('Filter'); //assuming you set up the schema/model for it
  $c->where(array(
    'filter' => $filter,
  ));
  $c->sortby('value'); 
  
  $result = array();
  foreach ($modx->getIterator('Filter, $c) as $filter) {
    $result[] = $filter->toArray();
  }
  
  if (empty($result)) {
    $modx->sendRedirect($modx->makeUrl($modx->getOption('error_page')));
  }
  return $result;
}

$filters = getFilter($filter);

foreach($filters as $k => $fields) {
   echo $fields['whatever'];
}

function getFilter($filter = '') {
  $c = $modx->newQuery('Filter'); //assuming you set up the schema/model for it
  $c->where(array(
    'filter' => $filter,
  ));
  $c->sortby('value'); 
   
 
  $result = $modx->getIterator('Filter, $c);
   
  if (empty($result)) {
    $modx->sendRedirect($modx->makeUrl($modx->getOption('error_page')));
  }
  return $result;
}

$filters = getFilter($filter);
foreach($filters as $filterObject) {
   $fields = $filterObject->toArray();
   echo $fields['whatever'];
}