getthreadcover 函數：function getthreadcover($tid, $cover = 0, $getfilename = 0) {  global $_G;  if(empty($tid)) {    return '';  }  $coverpath = '';  $covername = 'threadcover/'.substr(md5($tid), 0, 2).'/'.substr(md5($tid), 2, 2).'/'.$tid.'.jpg';  if($getfilename) {    return $covername;  }  if($cover) {    $coverpath = ($cover < 0 ? $_G['setting']['ftp']['attachurl'] : $_G['setting']['attachurl']).'forum/'.$covername;  }  return $coverpath;}

{eval   $covername = 'threadcover/'.substr(md5($thread[tid]), 0, 2).'/'.substr(md5($thread[tid]), 2, 2).'/'.$thread[tid].'.jpg';    $coverpath = ($cover < 0 ? $_G['setting']['ftp']['attachurl'] : $_G['setting']['attachurl']).'forum/'.$covername;}

<li style="width: 227px;  left: 0px; top: 0px;float:left;">  <div class="c cl">  <a class="z" title="$thread[subject]" onclick="atarget(this)" href="forum.php?mod=viewthread&tid=$thread[tid]">  <img width="203" alt="$thread[subject]" src="{eval echo $coverpath;}">  </a>  </div>  <h3 class="xw0">  <a href="forum.php?mod=viewthread&tid=$thread[tid]" onclick="atarget(this)" target="_blank" {if $thread['displayorder'] == -1}class="recy"{/if}>$thread[subject]</a>    </h3>  <div class="auth cl">  <cite class="xg1 y">  {lang like}: <em>$thread[views]</em>   {lang reply}: <a title="0 回復" href="forum.php?mod=viewthread&tid=$thread[tid]">$thread[replies]</a>  </cite>  <a href="home.php?mod=space&uid=$thread[authorid]" target="_blank">$thread[author]</a>$thread[dateline]</div></li>