class special extends CActiveRecord {
}
abstract class CActiveRecord extends CModel{
}

/**
* Returns an iterator for traversing the attributes in the model.
* This method is required by the interface IteratorAggregate.
* @return CMapIterator an iterator for traversing the items in the list.
*/
public function getIterator()
{
$attributes=$this->getAttributes();
return new CMapIterator($attributes);
}