Here is a very klunky way of doing it. Any more suggestions?
while ($row = mysql_fetch_object ($result)) {
$tld[] = $row->tld;
$hits[] = $row->hits;
$size[] = $row->size;
}
$the_final_array = array (
"tld" => $tld,
"hits" => $hits,
"size" => $size
);