getthreadcover 函數：    function getthreadcover($tid, $cover = 0, $getfilename = 0) {        global $_G;        if(emptyempty($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>