neerolyte/php-lyte-xml

<?php
namespace Lyte\XML;
/**
 * LyteDOMNodeList ensures that returned DOMNodes are actually LyteDOMNodes
 *
 * Implements Iterator because DOMNodeList implements Traversable, which is not
 * available to classes that exist outside of PHP's internal C code.
 */
class DOMNodeList extends XMLDecorator implements \Iterator {
    private $pos = 0;

    public function current() {
        $raw = $this->decorated->item($this->pos);
        return $this->decorate($raw);
    }
    public function next() { $this->pos++; }
    public function key() { return $this->pos; }
    /**
     * Is the current position valid?
     */
    public function valid() {
        return 
            $this->pos < $this->decorated->length 
            && $this->pos >= 0;
    }
    public function rewind() { $this->pos = 0; }

    /**
     * Provide a simple API to iterate over key value pair XML like:
     *    <key1>value1</key1>
     *    <key2>value2</key2>
     *    ...
     *    <keyN>valueN</keyN>
     */
    public function toPairs() {
        return new DOMNodeListPairsIterator($this);
    }
}