DOMNodeListIterator.php

<?php

/**
 * DOMNodeListIterator
 *
 * Prior to PHP 5.3, DOMNodeList is not iterable. This solves that.
 * Requires PHP SPL extension (for interface Iterator)
 *
 * Usage:
 * $nodeIter = new DOMNodeListIterator($instanceOfClassDOMNodeList);
 * foreach ($nodeIter as $node) { ... }
 *
 * Ryan W Tenney <ryan@10e.us>
 */
class DOMNodeListIterator implements Iterator {

	private $pos = 0;
	private $length;
	private $nodelist;

	public function __construct(DOMNodeList $nodelist) {
		$this->nodelist = $nodelist;
		$this->length = $nodelist->length;
	}

	public function rewind() {
		$this->pos = 0;
	}

	public function current() {
		return $this->pos < $this->length ? $this->nodelist->item($this->pos) : false;
	}

	public function key() {
		return $this->pos;
	}

	public function next() {
		++$this->pos;
		return $this->current();
	}

	public function valid() {
		return $this->pos < $this->length;
	}

}