PHPMyWind安全警告：MySql Error！

错误文件：/productshow.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 'AND `checkinfo`=true ORDER BY orderid ASC' at line 1 Error sql: SELECT * FROM `pmw_infoclass` WHERE `parentid`= AND `checkinfo`=true ORDER BY orderid ASC