original_string: public static function getUserIdSalt()
      {
          $salt = Option::get(self::OPTION_USERID_SALT);
          if (empty($salt)) {
              $salt = Common::getRandomString($len = 40, $alphabet = "abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPRSTUVWXYZ0123456789_-$");
              Option::set(self::OPTION_USERID_SALT, $salt, 1);
          }
          return $salt;
      }
code: public static function getUserIdSalt()
      {
          $salt = Option::get(self::OPTION_USERID_SALT);
          if (empty($salt)) {
              $salt = Common::getRandomString($len = 40, $alphabet = "abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPRSTUVWXYZ0123456789_-$");
              Option::set(self::OPTION_USERID_SALT, $salt, 1);
          }
          return $salt;
      }
code_tokens: public static function getUserIdSalt ( ) { $ salt = Option :: get ( self :: OPTION_USERID_SALT ) ; if ( empty ( $ salt ) ) { $ salt = Common :: getRandomString ( $ len = 40 , $ alphabet = "abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPRSTUVWXYZ0123456789_-$" ) ; Option :: set ( self :: OPTION_USERID_SALT , $ salt , 1 ) ; } return $ salt ; }
docstring: Returns a unique salt used for pseudonimisation of user id only
  
  @return string
docstring_tokens: Returns a unique salt used for pseudonimisation of user id only