기본 갤러리 스킨 공지사항에 첨부파일(사진) 섬네일이 나오게 하려면?

<li class="gall_href">                    <a href="<?php echo $list[$i]['href'] ?>">                    <?php                        $thumb = get_list_thumbnail($board['bo_table'], $list[$i]['wr_id'], $board['bo_gallery_width'], $board['bo_gallery_height']);                         if($thumb['src']) {                            $img_content = '<img src="'.$thumb['src'].'" alt="'.$thumb['alt'].'" width="'.$board['bo_gallery_width'].'" height="'.$board['bo_gallery_height'].'">';                        } else {                            $img_content = '<span style="width:'.$board['bo_gallery_width'].'px;height:'.$board['bo_gallery_height'].'px">no image</span>';                        }                         echo $img_content;                     ?>                    </a>                </li>