call Rss feed in php

function RSS_Tags($item, $type)
{
$y = array();
$tnl = $item->getElementsByTagName("title");
$tnl = $tnl->item(0);
$title = $tnl->firstChild->textContent;

$tnl = $item->getElementsByTagName("link");
$tnl = $tnl->item(0);
$link = $tnl->firstChild->textContent;

$tnl = $item->getElementsByTagName("description");
$tnl = $tnl->item(0);
$description = $tnl->firstChild->textContent;

$y["title"] = $title;
$y["link"] = $link;
$y["description"] = $description;
$y["type"] = $type;

return $y;
}


function RSS_Channel($channel)
{
global $RSS_Content;

$items = $channel->getElementsByTagName("item");

// Processing channel

$y = RSS_Tags($channel, 0); // get description of channel, type 0
array_push($RSS_Content, $y);

// Processing articles

foreach($items as $item)
{
$y = RSS_Tags($item, 1); // get description of article, type 1
array_push($RSS_Content, $y);
}
}

function RSS_Retrieve($url)
{
global $RSS_Content;

$doc = new DOMDocument();
$doc->load($url);

$channels = $doc->getElementsByTagName("channel");

$RSS_Content = array();

foreach($channels as $channel)
{
RSS_Channel($channel);
}

}


function RSS_RetrieveLinks($url)
{
global $RSS_Content;

$doc = new DOMDocument();
$doc->load($url);

$channels = $doc->getElementsByTagName("channel");

$RSS_Content = array();

foreach($channels as $channel)
{
$items = $channel->getElementsByTagName("item");
foreach($items as $item)
{
$y = RSS_Tags($item, 1); // get description of article, type 1
array_push($RSS_Content, $y);
}

}

}


function RSS_Links($url, $size = 15)
{
global $RSS_Content;

$page = "

";

RSS_RetrieveLinks($url);
if($size > 0)
$recents = array_slice($RSS_Content, 0, $size + 1);

foreach($recents as $article)
{
$type = $article["type"];
if($type == 0) continue;
$title = $article["title"];
$link = $article["link"];
$page .= "
• $title
\n";
}

$page .="

\n";

return $page;

}



function RSS_Display($url, $size = 15, $site = 0)
{
global $RSS_Content;

$opened = false;
$page = "";
$site = (intval($site) == 0) ? 1 : 0;

RSS_Retrieve($url);
if($size > 0)
$recents = array_slice($RSS_Content, $site, $size + 1 - $site);

foreach($recents as $article)
{
$type = $article["type"];
if($type == 0)
{
if($opened == true)
{
$page .="\n";
$opened = false;
}
$page .="";
}
else
{
if($opened == false)
{
$page .= "

\n";
$opened = true;
}
}
$title = $article["title"];
$link = $article["link"];
//$description = $article["description"];
$page .= "
• $title";
  if($description != false)
  {
  $page .= "
  $description";
  }
  $page .= "
\n";

if($type==0)
{
$page .="
";
}

}

if($opened == true)
{
$page .="

\n";
}
return $page."\n";

}


?>

$url="http://www.referd.info/tag/php/rss.php";
echo RSS_Display($url, 15);
?>