function set_content_type()
      {
          preg_match("#content-type:([^\r\n]*)#i", this->response_headers, $matches);\; if\; (trim($matches[1]) != '')
          {
              $content\_type\_array\; =\; explode(\text{'};\text{'},$matches[1]);
              $this->content\_type\; =\; strtolower(trim($content_type_array[0]));
          }
      }