setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$error = '';
$success = '';
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$username = filter_input(INPUT_POST, 'username', FILTER_SANITIZE_STRING);
$password = $_POST['password'] ?? '';
$pgp_key = $_POST['pgp_key'] ?? '';
$ip = $_SERVER['REMOTE_ADDR'];
if ($username && $password) {
if (strlen($username) > 50 || strlen($password) < 8) {
$error = 'Invalid data';
} else {
$stmt = $db->prepare('SELECT COUNT(*) FROM registrations WHERE ip = ? AND created_at > DATE_SUB(NOW(), INTERVAL 1 HOUR)');
$stmt->execute([$ip]);
$count = $stmt->fetchColumn();
if ($count >= 5) {
$error = 'Registration limit exceeded for your IP';
} else {
try {
$stmt = $db->prepare('INSERT INTO users (username, password, pgp_key) VALUES (?, ?, ?)');
$stmt->execute([$username, password_hash($password, PASSWORD_DEFAULT), $pgp_key]);
$stmt = $db->prepare('INSERT INTO registrations (ip) VALUES (?)');
$stmt->execute([$ip]);
$success = 'Registration successful';
} catch (PDOException $e) {
$error = 'Username already exists';
}
}
}
}
}
?>
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