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 ': Undefined variable: pid in /webHome/host8457758/www/productlist.php on line 85' at line 1 Error sql: SELECT * FROM `xs_product_ejlm_yjlm` WHERE id=Notice: Undefined variable: pid in /webHome/host8457758/www/productlist.php on line 85