class classe01 {

private $return_object;

    function __construct ($properties_array) {
        //create an extended class with the given properties 
        self::return_object = "class classe02 extends __CLASSE_ { private function __construct (); ";
        while (list ($key) = each ($properties_array)) {
            self::return_object .= "var " . $properties_array[$key] . "; ";
        }
        self::return_object .= "}";
        
        eval (self::return_object);
        
        return new classe02;
    }
}