Check out this SlideShare Presentation:

Using Objects to Organize your jQuery Code

View more presentations from Rebecca Murphey.

Nice video for those who're moving their first steps into the JavaScript objects world.

The PHP DOMDocument class implements the W3C DOM. However, PHP implementation is quite different from its JavaScript counterpart, so it's not so easy to make something like this:

$dom = new DOMDocument();
$dom->load('test.xml');

$items = $dom->getElementsByTagName('item');
$items = array_slice($items, 0, 3); // returns an error

The fact is that we're actually dealing with a NodeList collection of DOM element objects, so it's not possible to use array functions on them (with JavaScript there are a couple of tricks to perform this operation, though). I have to test more extensively this feature to solve this problem. So far I've played a little bit with PHP iterators, but I wasn't lucky, perhaps because I'm using a wrong approach. I'll let you know, so stay tuned.