<?php 
$param1 = param(0,'');
if($param1 == 'search'){
	$tids = array();
	$threadlist_key = 'key_search_';
	foreach($threadlist as $val){
		array_push($tids,$val['tid']);
		$threadlist_key .= $val['tid'];
	}
	$threadlist_cache = cache_get($threadlist_key);//key超过32位自动转成md5值
	if(!isset($threadlist_cache)||empty($threadlist_cache)){
		//查询文章内容
		$cond = db_cond_to_sqladd(array('tid'=>$tids,'isfirst'=>1));
		$postlist = db_sql_find("SELECT * FROM `bbs_post` $cond");
		foreach($threadlist as &$val){
			foreach($postlist as $post){
				if($post['tid']==$val['tid']){
					$val['intro'] = xn_substr(strip_tags($post['message']), 0, 88);
					break;
				}
			}
		}
		cache_set($threadlist_key, $threadlist,3600);//有效期1小时
	}else{
		$threadlist = $threadlist_cache;
	}
}
?>