出错信息：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-16,16' at line 1
出错SQL：select * from ex_product where pro_bigid=3 and pro_smallid=10 order by pro_index asc limit -16,16
出错文件地址：/weipai/shiguanwei.com/inc/mysql_class.php
出错行号：181行
出错代码：42000