-- 模糊搜索只是搜索标题

 $sql = "select count(*) as sum from publish where pub_title like '%{$keyword}%' or pub_content like '%{$keyword}%'";

 -- 模糊搜索搜索标题和内容

 $sql = "select * from publish left join user on pub_owner = user_name where pub_title like '%{$keyword}%' or pub_content like '%{$keyword}%' order by pub_time desc limit $offset, $rowsPerPage";

 // 查询今日帖数

 // 今日的日期20170916

 $today_time = date('Y-m-d',time());

 $today_sql ="select count(*) as sum from (select from_unixtime(pub_time) as t  from publish) as a where  a.t like '%{$today_time}%'";

 $today_result = my_query($today_sql);

 $today_row = mysql_fetch_row($today_result);