gistfile1.php

<?php
/**
 * @author Evgeny Shpilevsky <evgeny@shpilevsky.com>
 */

class Post
{

    /**
     * @var string
     */
    protected $title;

    /**
     * @param string $title
     */
    public function setTitle($title)
    {
        $this->title = $title;
    }

    /**
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

}

class PostContainer implements IteratorAggregate
{

    /**
     * @var Post[]
     */
    protected $posts;

    /**
     * @var int
     */
    protected $archiveCount;

    /**
     * @param Post[] $posts
     * @param int $archiveCount
     */
    public function __construct(array $posts, $archiveCount)
    {
        $this->posts = $posts;
        $this->archiveCount = $archiveCount;
    }

    /**
     * @return int
     */
    public function getArchiveCount()
    {
        return $this->archiveCount;
    }

    /**
     * @return ArrayIterator|Traversable
     */
    public function getIterator()
    {
        return new ArrayIterator($this->posts);
    }

}

$news = new PostContainer($this->getService()->getLatestNews(), $this->getService()->getArchiveCount());

// где-то
foreach ($news as $post) {
    echo $post->getTitle();
    // something else
}

echo $news->getArchiveCount();