index.php

<?php

    class BlogPost
    {
        var $date;
        var $ts;
        var $link;

        var $title;
        var $text;
    }

    class BlogFeed
    {
        var $posts = array();

        function BlogFeed($feed_uri)
        {
            $xml_source = file_get_contents($feed_uri);
            $x = simplexml_load_string($xml_source);

            if(count($x) == 0)
                return;

            foreach($x->channel->item as $item)
            {
                $post = new BlogPost();
                $post->date = (string) $item->pubDate;
                $post->ts = strtotime($item->pubDate);
                $post->link = (string) $item->link;
                $post->title = (string) $item->title;
                $post->text = (string) $item->description;

                // Create summary as a shortened body and remove images, extraneous line breaks, etc.
                $summary = $post->text;
                $summary = preg_replace('/<img[^>]*>/i', "", $summary);
                $summary = preg_replace('/^(<br[ ]?\/>)*/i', "", $summary);
                $summary = preg_replace('/(<br[ ]?\/>)*$/i', "", $summary);

                // Truncate summary line to 100 characters
                $max_len = 100;
                if(strlen($summary) > $max_len)
                    $summary = substr($summary, 0, $max_len) . '...';

                $post->summary = $summary;

                $this->posts[] = $post;
            }
        }
    }


   $blogFeed = new BlogFeed('http://rss.cnn.com/rss/edition_world.rss');
   $feed = $blogFeed->posts;

   $weHaveElements = false;
   $result = '{ "items": [';

   if (count($feed) > 0) {
        $weHaveElements = true;

        foreach ($feed as $i => $value)
        {
            $result .= '{"id": "'.$i.'", "html": "<a href=\"'.$value->link.'\">'.str_replace('"', '\"', $value->title).'</a><br />'.str_replace('"', '\"', $value->summary).'<br />'.$value->date.'"}, ';
        }
   }

   $result = $weHaveElements ? substr($result, 0, -2) : $result;
   echo $result.' ] }';
?>