prepare('SELECT id FROM users WHERE username = ?'); $st->execute([$username]); if ($st->fetch()) { echo "❗Brugeren '$username' findes allerede."; exit; } $hash = password_hash($password, PASSWORD_DEFAULT); $st = $db->prepare('INSERT INTO users (username, password, role) VALUES (?, ?, ?)'); $st->execute([$username, $hash, $role]); echo "✅ Bruger oprettet: $username / $password (rolle: $role)";