$sphinx = new SphinxClient();
                $sphinx->SetServer('localhost', 9313);
                $sphinx->SetLimits(0, 200, 200);
                $sphinx->SetMatchMode(SPH_MATCH_EXTENDED2);
                $sphinx->SetSortMode ( SPH_SORT_RELEVANCE );
                $sphinx->SetRankingMode(SPH_RANK_PROXIMITY_BM25);
                $sphinx->SetFieldWeights(array(
                    'brand_name' => 10,
                    'header' => 9,
                    'code' => 7
                ));
                $sphinxResult = $sphinx->Query(implode(' ', $query_arr));