썸네일 첫번째깨 안나와요~ 채택완료

안녕하세요

게시판 수정해서 사용하고 있는데요

배경으로 썸네일을 보여지고 했는데 첫번째만 안나오네요 왜이러는 걸까요/. ㅜㅜ

<?php for ($i=0; $i<count($list); $i++) {
            if($i>0 && ($i % $bo_gallery_cols == 0))
                $style = 'clear:both;';
            else
                $style = '';
            if ($i == 0) $k = 0;
            $k += 1;
            if ($k % $bo_gallery_cols == 0) $style .= "margin:0 !important;";
         ?>
       
        <div class="col-md-3 col-sm-6 col-padding text-center animate-box img100">
       
          <a href="#" class="work image-popup" style="background-image: url(<?php echo $thumb['src'] ?>);">
                <div class="desc">
                    <h3><?php echo $list[$i]['subject'] ?></h3>
                    <span>Illustration</span>
                </div>
       
    <?php if ($is_checkbox) { ?>
                <label for="chk_wr_id_<?php echo $i ?>" class="sound_only"><?php echo $list[$i]['subject'] ?></label>
                <input type="checkbox" name="chk_wr_id[]" value="<?php echo $list[$i]['wr_id'] ?>" id="chk_wr_id_<?php echo $i ?>">
                <?php } ?>
                <span class="sound_only">
                    <?php
                    if ($wr_id == $list[$i]['wr_id'])
                        echo "<span class=\"bo_current\">열람중</span>";
                    else
                        echo $list[$i]['num'];
                     ?>
                </span>
               
                      
                <?php
                if ($list[$i]['is_notice']) { // 공지사항  ?>
                    <strong style="width:<?php echo $board['bo_gallery_width'] ?>px;height:<?php echo $board['bo_gallery_height'] ?>px">공지</strong>
                <?php } else {
                    $thumb = get_list_thumbnail($board['bo_table'], $list[$i]['wr_id'], $board['bo_gallery_width'], $board['bo_gallery_height']);
   
                    if($thumb['src']) {
                        $img_content = '';
                    } else {
                        $img_content = '<span style="width:'.$board['bo_gallery_width'].'px;height:'.$board['bo_gallery_height'].'px">no image</span>';
                    }
   
                    echo $img_content;
                }
                 ?>
                </a>
            </div>
                    
           
        <?php } ?>
        <?php if (count($list) == 0) { echo "<li class=\"empty_list\">게시물이 없습니다.</li>"; } ?>