prepare("SELECT id FROM users WHERE username = ?"); $check->execute([$username]); if ($check->fetch()) { $error = "Username already taken."; } else { // Create account $hash = password_hash($password, PASSWORD_DEFAULT); $stmt = $pdo->prepare(" INSERT INTO users (username, password_hash, is_over_18) VALUES (?, ?, ?) "); $stmt->execute([$username, $hash, $over18]); $_SESSION['user_id'] = $pdo->lastInsertId(); $_SESSION['username'] = $username; $_SESSION['is_over_18'] = $over18; header("Location: index.php"); exit; } } } ?> Register

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