execute($sql, [$username, $password]); if ($user && count($user) > 0) { $_SESSION['usr_id'] = $user[0]['usr_id']; $_SESSION['usr_user'] = $user[0]['usr_user']; $_SESSION['usr_key'] = $user[0]['usr_key']; header('Location: /'); exit; } else { $error = 'Invalid username or password'; } } } ?>