安全警告：MySql Error！

错误文件：/show.php
错误信息：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 '-1,1' at line 1 Error sql: SELECT * FROM `ctc_infoimg` WHERE (classid=38 OR parentstr LIKE '%,38,%') AND delstate='' AND checkinfo=true AND id!=305 order by orderid desc limit -1,1