prepare("SELECT * FROM users WHERE student_id = ? AND email = ? AND role = ?");
$stmt->execute([$student_id, $email, $role]);
$user = $stmt->fetch();
if ($user && password_verify($password, $user['password_hash'])) {
$_SESSION['user_id'] = $user['id'];
$_SESSION['user_role'] = $user['role'];
header('Location: index.php');
exit;
} else {
$error = 'Invalid Credentials. Please check your UID, Email, and Role.';
if (isset($_POST['role'])) { // Detect if coming from landing modal
header('Location: index.php?error=' . urlencode($error));
exit;
}
}
}
?>
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