PHPMyWind安全警告：MySql Error！

错误文件：/myfamily.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 l_b= or l_c=' at line 1 Error sql: select count(*) as z from `fenxiao1000_member` WHERE l_id= or l_b= or l_c=