function SN_RegisterUser($registration_data) {
  global $sn, $sqlConnect;

  if (empty($registration_data)) {
    return false;
    }

  $ip = '0.0.0.0';
  $registration_data['registered'] = date('n') . '/' . date("Y");
  if (isset($_SERVER['REMOTE_ADDR'])) {
    $ip = $_SERVER['REMOTE_ADDR'];
    }

  $registration_data['password']   = md5($registration_data['password']);
  $registration_data['ip_address'] = SN_Secure($ip);
  $fields = '`' . implode('`, `', array_keys($registration_data)) . '`';
  $data = ''' . implode('', '', $registration_data) . ''';

  $query = mysqli_query($sqlConnect, "INSERT INTO " . T_USERS . " ({$fields}) VALUES ({$data})");

  if ($query) {
    return true;
  } else {
    return false;
    }
  }

function SN_Login($username, $password) {
  global $sqlConnect;
if (empty($username) || empty($password)) {
    return false;
}
$username = SN_Secure($username);
$password = SN_Secure(md5($password));
$query = mysqli_query($sqlConnect, "SELECT COUNT(`user_id`) FROM " . T_USERS . " WHERE `username` = '{$username}' AND `password` = '{$password}'");
return (SN_Sql_Result($query, 0) == 1) ? true : false;
}