게시판에 등록된 파일 꺼내는방법좀 알려주세용.

<?php
$bo_table = "notice"; //게시판Table
$wr_id    = 12;       //게시글Id
$bf_no    = 2;        //몇번째이미지
$width    = 400;      //가로Size(widht)
$height   = 300;      //세로Size(height)

$bf_no--;
$sql_bf = " select bf_file, bf_content from {$g5['board_file_table']}
   where bo_table = '{$bo_table}' and wr_id = '{$wr_id}' and bf_type between '1' and '3' order by bf_no limit {$bf_no}, 1";
$row_bf = sql_fetch($sql_bf);

if($row_bf['bf_file']) {
 $filename = $row_bf['bf_file'];
 $filepath = G5_DATA_PATH.'/file/'.$bo_table;
 $alt = get_text($row_bf['bf_content']);
 $tname = thumbnail($filename, $filepath, $filepath, $width, $height, false);
 $src = G5_DATA_URL.'/file/'.$bo_table.'/'.$tname;
 echo '<img src="'.$src.'" alt="'.$alt.'"  >';
}
?>