가져오고 싶은 게시판 글만 모아서 최신순으로!

<?
if (!defined('_GNUBOARD_')) exit;

// 최신글 추출
function latest($skin_dir="", $bo_table, $rows=10, $subject_len=40, $options="")
{
global $g4;

if ($skin_dir)
$latest_skin_path = "$g4[path]/skin/latest/$skin_dir";
else
$latest_skin_path = "$g4[path]/skin/latest/basic";

$list = array();

$bo_table_exp = explode(",",$bo_table);
$bo_table_exp_cnt = count($bo_table_exp); // 추가된 코드

//$sql = " select * from $g4[board_table] where bo_table = '$bo_table'"; 원본소스
if(count($bo_table_exp)==1) $sql = " select * from $g4[board_table] where bo_table = '$bo_table'";
if(count($bo_table_exp)==1) $board = sql_fetch($sql);
if(count($bo_table_exp)==1) $tmp_write_table = $g4['write_prefix'] . $bo_table; // 게시판 테이블 전체이름

//$sql = " select * from $tmp_write_table where wr_is_comment = 0 order by wr_id desc limit 0, $rows ";
// 위의 코드 보다 속도가 빠름

//$sql = " select * from $tmp_write_table where wr_is_comment = 0 order by wr_num limit 0, $rows "; 원본소스
if(count($bo_table_exp)==1){
$sql = " select * from $tmp_write_table where wr_is_comment = 0 order by wr_num limit 0, $rows ";
}else{
$new_sql = " SELECT * FROM `g4_board_new` WHERE ";
for($n=0; $n<$bo_table_exp_cnt; $n++){
$new_sql = $new_sql." `bo_table` = '".$bo_table_exp[$n]."' ";
if($n<$bo_table_exp_cnt-1){$new_sql = $new_sql." OR "; };
}
$new_sql = $new_sql." ORDER BY `bn_datetime` DESC LIMIT 0, $rows ";
$new_result = sql_query($new_sql);

for ($i=0; $new_row = sql_fetch_array($new_result); $i++){
$sql = $sql." SELECT * FROM `".$g4['write_prefix'].$new_row['bo_table']."` WHERE `wr_id` = ".$new_row['wr_id'] ;
if($i<$rows-1) $sql = $sql." UNION ALL ";
$new_board[] = $new_row['bo_table'];
}
}

//explain($sql);
$result = sql_query($sql);

if(count($bo_table_exp)==1){
for ($i=0; $row = sql_fetch_array($result); $i++){
$list[$i] = get_list($row, $board, $latest_skin_path, $subject_len);
}
}else{
for ($i=0; $row = sql_fetch_array($result); $i++){
$board['bo_table'] = $new_board[$i];
$list[$i] = get_list($row, $board, $latest_skin_path, $subject_len);
}
}

ob_start();
include "$latest_skin_path/latest.skin.php";
$content = ob_get_contents();
ob_end_clean();

return $content;
}
?>

메인화면에
<?=latest("wn_list_all", "portfolio,wallpaper,freeboard,playground", 15, 35);?>
이렇게 입력을 했구요.. 가운데 들어있는 게시판에서만 리스트를 가지고 옵니다...
latest.lib.php만 수정해서 성공한것 같은데요...
이걸 좀 더 그누보드 스럽게 코딩 할 수 있을까요?