relevanssi_hits_filter

/** Relevanssi customization by max **/
add_filter('relevanssi_hits_filter', 'order_the_results');

function order_the_results($hits) {
    global $wp_query;

    switch ($wp_query->query_vars['orderby']) {

        case 'likes':
            $likes = array();
            foreach ($hits[0] as $hit) {
                $likecount = get_post_meta($hit->ID, '_likes', true);
            if (!isset($likes[$likecount])) $likes[$likecount] = array();
            array_push($likes[$likecount], $hit);
        }

        if ($wp_query->query_vars['order'] == 'asc') {
          ksort($likes);
        } else {
          krsort($likes);
        }

        $sorted_hits = array();
        foreach ($likes as $likecount => $year_hits) {
            $sorted_hits = array_merge($sorted_hits, $year_hits);
        }
        $hits[0] = $sorted_hits;
        break;

    case 'comments':

        $comments = array();
        foreach ($hits[0] as $hit) {
            $commentcount = wp_count_comments($hit->ID)->total_comments;
            if (!isset($comments[$commentcount])) $comments[$commentcount] = array();
            array_push($comments[$commentcount], $hit);
        }

        if ($wp_query->query_vars['order'] == 'asc') {
            ksort($comments);
            } else {
            krsort($comments);
        }

        $sorted_hits = array();
        foreach ($comments as $commentcount => $year_hits) {
            $sorted_hits = array_merge($sorted_hits, $year_hits);
        }
        $hits[0] = $sorted_hits;

    break;

    case 'relevance':
        //do nothing
        break;

     }


    return $hits;
}