RecursiveArrayIterator.php

<?php

class ObjectIterator implements Iterator{
    protected $object;
    protected $reflectionObject;
    protected $properties;

    public function __construct( $object ){
        $this->object = $object;

        $this->reflectionObject = new ReflectionObject($object);
        $this->properties = $this->reflectionObject->getProperties();
    }

    public function current(){
        $item = current( $this->properties );
        $item->setAccessible(true);
        return $item->getValue( $this->object );
    }
    public function key(){
        return current( $this->properties )->getName();
    }
    public function next(){
        next( $this->properties );
    }

    public function rewind(){
        reset( $this->properties );
    }
    public function valid(){
        $key = key($this->properties);
        return isset( $this->properties[$key] );
    }
}

class RecursiveObjectIterator implements RecursiveIterator{
    protected $iterator;

    public function __construct( $object ){
        if( is_array($object) ){
            $this->iterator = new ArrayIterator( $object );
        }else{
            $this->iterator = new ObjectIterator( $object );
        }
    }

    public function getChildren(){
        return new RecursiveObjectIterator( $this->iterator->current() );
    }
    public function hasChildren(){
        $current = $this->iterator->current();
        return is_object( $current ) || is_array( $current );
    }

    public function current(){
        return $this->iterator->current();
    }
    public function key(){
        return $this->iterator->key();
    }
    public function next(){
        $this->iterator->next();
    }

    public function rewind(){
        $this->iterator->rewind();
    }
    public function valid(){
        return $this->iterator->valid();
    }
}