public function filterByManufacturers($IDs) { $IDs = is_array($IDs) ? $IDs : ($IDs ? array($IDs) : array()); foreach ($IDs as $i => $id) { $IDs[$i] = Manufacturer::toID($id); } if (!empty($IDs)) { $this->sqlWhere['manufacturer_id IN (' . implode(',', $IDs) . ')'] = 1; } }