RssParser.php

<?php

/**
 * @author Arian Stolwijk <http://www.aryweb.nl>
 * @license MIT-license
 */


/*
$rss = new Rss_Parser();
$rss->load('http://feeds.feedburner.com/tweakers/mixed');


foreach($rss->getItems() as $item){
	echo '<a href="'.$item->getLink().'">'.$item->getTitle().'</a><br />';
}
*/


class Rss_Parser {

	/**
	 *
	 * @var DOMDocument
	 */
	protected $doc;

	/**
	 *
	 * @var array
	 */
	protected $items = array();

	public function __construct(){
		$this->doc = new DOMDocument();
	}

	/**
	 *
	 * @param string $url
	 * @return Rss_Parser
	 */
	public function load($url){
		$this->doc->load($url);
		return $this;
	}

	/**
	 *
	 * @return DOMNode
	 */
	protected function getChannel(){
		return $this->doc->getElementsByTagName('channel')->item(0);
	}

	/**
	 *
	 * @param $reparse Should it reparse the rss feed if it was already done
	 * @return array with instances of Rss_Item
	 */
	public function getItems($reparse=false){
		if(empty($this->items) || $reparse){
			$channel = $this->getChannel();

			foreach($channel->getElementsByTagName("item") as $domItem){
				$this->items[] = $this->parseItem($domItem);
			}
		}
		return $this->items;
	}

	/**
	 * Get a certain item from the items
	 * @param $i
	 * @return Rss_Item
	 */
	public function getItem($i){
		$items = $this->getItems();
		if(isset($items[$i])){
			return $items[$i];
		}
		return false;
	}

	/**
	 * Parses an item
	 * @param DOMNode $item
	 * @return Rss_Item
	 */
	protected function parseItem(DOMNode $item){
		$i = new Rss_Item();

		$i->setTitle(			$item->getElementsByTagName("title")->item(0)->firstChild->data)
			->setLink(			$item->getElementsByTagName("link")->item(0)->firstChild->data)
			->setDescription(	$item->getElementsByTagName("description")->item(0)->firstChild->data);

		return $i;
	}
}


class Rss_Item {

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

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

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

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

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

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

	/**
	 *
	 * @param string $link
	 * @return Rss_Item
	 */
	public function setLink($link){
		$this->link = $link;
		return $this;
	}

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

	/**
	 *
	 * @param string $desc
	 * @return Rss_Item
	 */
	public function setDescription($desc){
		$this->description = $desc;
		return $this;
	}

	public function toArray(){
		return array(
			'title' => $this->getTitle(),
			'link' => $this->getLink(),
			'description' => $this->getDescription()
		);
	}

}