LdapTools\Utilities\LdapUtilities::isValidSid PHP Метод

    public static function isValidSid($value)
    {
        return (bool) preg_match(self::MATCH_SID, $value);
    }

 /**
  * {@inheritdoc}
  */
 public function getUsername($username)
 {
     if (LdapUtilities::isValidGuid($username)) {
         $username = '******' . $username . '}';
     } elseif (!(LdapUtilities::isValidSid($username) || $this->isValidUserDn($username) || $this->isInUpnForm($username))) {
         $username = parent::getUsername($username);
     }
     return $username;
 }