Viewing file:  DomRssParser.php (3.86 KB) -rw-rw-rw-
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<?php
/**
* @package SPLIB
* @version $Id: DomRssParser.php,v 1.1 2003/12/12 08:06:02 kevin Exp $
*/
/**
* DomRssParser Class
* Parses an RSS feed with DOM
* @access public
* @package SPLIB
*/
class DomRssParser {
/**
* Stores the data from a single <item /> tag as an stdClass
* @access private
* @var stdClass
*/
var $rssItem;
/**
* Stores a list of all <item /> tags
* @access private
* @var array
*/
var $rssItems;
/**
* DomRssParser constructor
* @access public
* @param string the RSS document
*/
function DomRssParser ($rssDoc) {
$dom = domxml_open_mem($rssDoc);
$this->rssItem=new stdClass;
$this->rssItems=array();
$this->Rdf($dom);
}
/**
* Iterator for RSS Items, returning prepared items as stdClasses
* Returns an instance of stdClass containing the parameters
* title, description and link or false if at end of collection
* @return mixed
* @access public
*/
function fetch () {
$item=each($this->rssItems);
if ( $item ) {
return $item['value'];
} else {
reset ( $this->rssItems );
return false;
}
}
/**
* Fetchs the root element
* @param resource instance of DOM Document
* @return void
* @access private
*/
function rdf ($dom) {
$rdf = $dom->document_element();
$this->items($rdf);
}
/**
* Fetches all the <item /> elements from the document
* @param resource instance of DOM Element for the root element
* @return void
* @access private
*/
function items ($rdf) {
$items = $rdf->get_elements_by_tagname('item');
$this->item ($items);
}
/**
* Populates $this->rssItems with single <item />'s
* @param array of DOM Elements for <item /> tags
* @return void
* @access private
*/
function item ($items) {
foreach ( $items as $item ) {
// Get the children of each item
$itemNodes = $item->child_nodes();
$this->itemNode($itemNodes);
$this->rssItems[]=$this->rssItem;
$this->rssItem=new stdClass;
}
}
/**
* Loops through an item's nodes
* @param array of DOM Elements item nodes
* @return void
* @access private
*/
function itemNode($itemNodes) {
foreach ( $itemNodes as $itemNode ) {
$itemContents=$itemNode->child_nodes();
$this->ItemContent($itemNode,$itemContents);
}
}
/**
* Collects the text nodes from within the content
* @param resource DOM Element for item node child
* @param array of DOM Elements for item node children
* @return void
* @access private
*/
function itemContent ($itemNode,$itemContents) {
foreach ( $itemContents as $itemContent ) {
if( $itemContent->node_type() == XML_TEXT_NODE ) {
$itemData=$itemContent->content;
$this->StoreData($itemNode,$itemData);
}
}
}
/**
* Stores the text node in the current $rssItem global variable
* @param resource DOM Element for item node child
* @param string contents of the text node child
* @return void
* @access private
*/
function storeData ($itemNode,$itemData) {
// Deal with the specific elements we want
switch ( strtoupper($itemNode->tagname) ) {
case 'TITLE':
$this->rssItem->title=$itemData;
break;
case 'DESCRIPTION':
$this->rssItem->description=$itemData;
break;
case 'LINK':
$this->rssItem->link=$itemData;
break;
}
}
}
?>
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