```php
prepare("SELECT * FROM admins WHERE username = ?");
$stmt->execute([$username]);
$admin = $stmt->fetch();
if ($admin && password_verify($password, $admin['password'])) {
$_SESSION['admin_logged_in'] = true;
header('Location: admin_dashboard.php');
exit;
} else {
$error = 'Invalid username or password';
}
}
?>
Admin Login
Admin Login
```