network.php里的代码！

//热门话题
$cachefile = S_ROOT.'./data/cache_network_thread.txt';
if(check_network_cache('thread')) {
        $threadlist = unserialize(sreadfile($cachefile));
} else {
        $sqlarr = mk_network_sql('thread',
                array('tid', 'uid'),
                array('hot','viewnum','replynum'),
                array('dateline','lastpost'),
                array('dateline','viewnum','replynum','hot')
        );
        extract($sqlarr);
        //显示数量
        $shownum = 10;
       
        $threadlist = array();
        $query = $_SGLOBAL['db']->query("SELECT main.*, m.tagname
                FROM ".tname('thread')." main
                LEFT JOIN ".tname('mtag')." m ON m.tagid=main.tagid

                WHERE ".implode(' AND ', $wherearr)."
                ORDER BY main.{$order} $sc LIMIT 0,$shownum");
        while ($value = $_SGLOBAL['db']->fetch_array($query)) {
                $value['tagname'] = getstr($value['tagname'], 20);
                $value['subject'] = getstr($value['subject'], 50);
                $threadlist[] = $value;
        }
        if($_SGLOBAL['network']['thread']['cache']) {
                swritefile($cachefile, serialize($threadlist));
        }
}
foreach($threadlist as $key => $value) {
        realname_set($value['uid'], $value['username']);
        $threadlist[$key] = $value;
}

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