function save() {
   $data = array();
   $dump  = print_r($this, 1);
   preg_match_all('/^\s+\[(\w+):private\]/m', $dump, $matches);
   foreach ($matches[1] as $property) {
      $data[$property] = $this->$property;
   }
   $this->db->update(POST_TABLE, $data, "id", $this->getId());
}