[Extension] Profile Additional Fields

//define('FORUM_DISABLE_HOOKS', 1);

  if (!function_exists('json_decode')) {
    function json_decode($json) {
      $comment = false;
      $out     = '$x=';
      for ($i=0; $i<strlen($json); $i++) {
        if (!$comment) {
          if (($json[$i] == '{') || ($json[$i] == '[')) {
            $out .= 'array(';
          }
          elseif (($json[$i] == '}') || ($json[$i] == ']')) {
            $out .= ')';
          }
          elseif ($json[$i] == ':') {
            $out .= '=>';
          }
          elseif ($json[$i] == ',') {
            $out .= ',';
          }
          elseif ($json[$i] == '"') {
            $out .= '"';
          }
          /*elseif (!preg_match('/\s/', $json[$i])) {
            return null;
          }*/
        }
        else $out .= $json[$i] == '$' ? '\$' : $json[$i];
        if ($json[$i] == '"' && $json[($i-1)] != '\\') $comment = !$comment;
      }
      eval($out. ';');
      return $x;
    }
  }

        if (!function_exists('json_encode'))
        {
            function json_encode($data)
            {
                switch ($type = gettype($data))
                {
                    case 'NULL':
                        return 'null';
                    case 'boolean':
                        return ($data ? 'true' : 'false');
                    case 'integer':
                    case 'double':
                    case 'float':
                        return $data;
                    case 'string':
                        return '"' . addslashes($data) . '"';
                    case 'object':
                        $data = get_object_vars($data);
                    case 'array':
                        $output_index_count = 0;
                        $output_indexed = array();
                        $output_associative = array();
                        foreach ($data as $key => $value)
                        {
                            $output_indexed[] = json_encode($value);
                            $output_associative[] = json_encode($key) . ':' . json_encode($value);
                            if ($output_index_count !== NULL && $output_index_count++ !== $key)
                            {
                                $output_index_count = NULL;
                            }
                        }
                        if ($output_index_count !== NULL) {
                            return '[' . implode(',', $output_indexed) . ']';
                        } else {
                            return '{' . implode(',', $output_associative) . '}';
                        }
                    default:
                        return ''; // Not supported
                }
            }
        }