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<?php
// Set up global variables
$rssItem=new stdClass; // Temporary variable stores contents of <item />
$rssItems=array(); // Stores a list of <item> objects
// Get the root RDF element
function rdf ($dom) {
$rdf = $dom->document_element();
// Call Items() to fetch all <item /> tags
items($rdf);
}
// Gets all the <item /> tags
function items ($rdf) {
// Fetch all the <item /> elements from the document
$items = $rdf->get_elements_by_tagname('item');
item ($items);
}
// Populates $rssItems with single <item />'s
function item ($items) {
global $rssItem, $rssItems;
// Loop through each item
foreach ( $items as $item ) {
// Get the children of each item
$itemNodes = $item->child_nodes();
itemNode($itemNodes);
$rssItems[]=$rssItem;
$rssItem=new stdClass;
}
}
// Fetches the contents within at <item />
function itemNode($itemNodes) {
// Loop through the children
foreach ( $itemNodes as $itemNode ) {
// Get the contents of each child
$itemContents=$itemNode->child_nodes();
itemContent($itemNode,$itemContents);
}
}
// Collects the text nodes from within the content
function itemContent ($itemNode,$itemContents) {
foreach ( $itemContents as $itemContent ) {
// If it's a text node, display the HTML
if( $itemContent->node_type() == XML_TEXT_NODE ) {
$itemData=$itemContent->content;
StoreData($itemNode,$itemData);
}
}
}
// Stores the text node in the current $rssItem global variable
function storeData ($itemNode,$itemData) {
global $rssItem;
// Deal with the specific elements we want
switch ( strtoupper($itemNode->tagname) ) {
case 'TITLE':
$rssItem->title=$itemData;
break;
case 'DESCRIPTION':
$rssItem->description=$itemData;
break;
case 'LINK':
$rssItem->link=$itemData;
break;
}
}
// Fetch the entire document
$rssDoc=file('http://www.sitepoint.com/rss.php');
$rssDoc=implode('',$rssDoc);
// Instantiate an instance of DOM from file
$dom = domxml_open_mem($rssDoc);
// Call the Rdf function to start parsing
rdf($dom);
// Build a table out of the $rssItems array
$table="<table width=\"450\">\n";
foreach ( $rssItems as $rssItem ) {
$table.="<tr>\n<td><a href=\"".$rssItem->link."\">".$rssItem->title."</a><br />\n";
$table.=$rssItem->description."</td>\n</tr>\n";
}
$table.="</table>\n";
echo ( $table );
?>
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