code: public function save()
  	{
  		$arrFields = $this->Database->getFieldNames($this->strTable);
  		$arrSet = array_intersect_key($this->arrData, array_flip($arrFields));
  
  		$this->Database->prepare("UPDATE " . $this->strTable . " %s WHERE id=?")
  					   ->set($arrSet)
  					   ->execute($this->id);
  	}
docs: Update the current record