Notice: Undefined index: userid in /users/2019/i1919067/public_html/2020/WebDB/login.php on line 16

Notice: Undefined index: password in /users/2019/i1919067/public_html/2020/WebDB/login.php on line 17
SELECT * FROM book_members WHERE userid = '' AND password = password('')로그인하지 못했습니다.