<?php
class myClass {
    private $tids=array();
    public $active_topics=array();
    public function __construct() { /* removed irrelevant code */ }

    public function getTopicsScore($topics=false,$params=array()) {

        // removed irrelevant code
        $results = $this->getScores($this->tids,$params);
        $local_topics=array();
        $start = microtime(true);

        foreach($results as $r) {
            //removed irrelevant code
            if(!isset($local_topics[$r['topic_id']])) {
                $local_topics[$r['topic_id']] = array_merge(array('tid' => $r['topic_id']),$this->default_values);
            }

            $local_topics[$r['topic_id']] = $this->getPointsBasic($r,$local_topics[$r['topic_id']]);
        }
        echo round(microtime(true)-$start,4);
        $this->active_topics=$local_topics;
        return $this->active_topics;
    }

    private function getPointsBasic($r,$t) {

        $t['d_score']       += $r['score'];
        $t['d_'.$r['type']] += $r['score'];

        switch($r['type']) {
            case 'likes':
                $r['score'] *= 2.3;
            break;

            //  more cases with different calculations etc....
        }

        $t[$r['type']]      += $r['score'];
        $t['total_score']   += $r['score'];

        return $t;
    }
    // removed irrelevant code
}