Something

$q = $db->query("SELECT members.photo as photo, members.login as login, avg(voting.votes) as votes
        FROM members, voting
        WHERE members.photo!=''
        GROUP BY members.photo
        ORDER BY votes DESC
        LIMIT 2");

    $photo = array();
    while (list($photos, $vote) = mysql_fetch_row($q)){
        $photo[] = array(
        
            'photos'  => $photos,
            'vote' => $vote
        );
    }
    print_r ($photo);