Fatal error: 'break' not in the 'loop' or 'switch' context in?

if (isset($_SESSION['id'])) {
    if (isset($_POST['passwordEnter'])) {
        $id1 = $_SESSION['id'];
        if (!preg_match('/^(?=.*\d)(?=.*[A-Z])(?=.*[a-z])[0-9A-Za-z_]{8,}$/', $_POST['password'])) {
            echo "<script>alert('Not secure enough, The password must be minimum 8 characters and must contain lower case letter, upper case letter and number')</script>";
            break;
        }
        elseif (htmlspecialchars($_POST['newPassword']) == htmlspecialchars($_POST['retypePassword'])) {
            $firebase->set(DEFAULT_PATH . "/ARCusers/$id1/password", htmlspecialchars($_POST['newPassword']));
        }
    }
} else {
    header("Location:email_form");
}