<?php
    function reply_overall_rating($id)
    {
        $good_rating = mysqli_fetch_array(mysqli_query_logged("SELECT COUNT(vote) AS num FROM community_messages_rating WHERE message_id = '" . $id . "' AND vote = '1'"));
        $bad_rating  = mysqli_fetch_array(mysqli_query_logged("SELECT COUNT(vote) AS num FROM community_messages_rating WHERE message_id = '" . $id . "' AND vote = '-1'"));
        return 1 + intval($good_rating['num']) - intval($bad_rating['num']); 
    }
?>