getthreadcover 函數(shù)：
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>$thread[views]</em>   {lang reply}: <a title="0 回復(fù)" href="forum.php?mod=viewthread&tid=$thread[tid]">$thread[replies]</a>
  </cite>
  <a href="home.php?mod=space&uid=$thread[authorid]" target="_blank">$thread[author]</a>$thread[dateline]</div>
</li>