安全警告：MySql Error！

错误文件：/listshow.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 'OR parentstr LIKE '%,,%') AND delstate='' AND checkinfo=true AND id=81' at line 1 Error sql: SELECT * FROM `ctc_infolist` WHERE (classid= OR parentstr LIKE '%,,%') AND delstate='' AND checkinfo=true AND id=81