PHP JSONP

<?php
    /**
    *
    *How does it work ?
    *   This class retrieves the news from the rss url. The array_n
    *
    *How To :
    *
    *   1st step :  $your_var =  new News ('rss.your_url.com');
    *
    *   2nd step :  call getNews function with the number of news you want to get
    *       tip¹ : to print the news without controlling the array just uncomment and style as you wish  on RSSParser.class.php -> endElement function
    *
    *   3rd step :  with a foreach/for/while you can fetch the array : $array_news of this class to get your news.
    *
    *               example:
    *                           <?
    *                       $folha_news = new News("http://feeds.folha.uol.com.br/emcimadahora/rss091.xml");
    *                       $folha_news->getNews();
    *                       $numb_news=1;
    *                       foreach ($folha_news->array_news as $key => $new) {?>
    *                           <div class="noticia_rss">
    *                               <div><span><?=$new['title']?></span><span><a href="<?=$new['link']?>" target="__blank"> Leia mais..</a></span></div>
    *                               <div class='description'><?=$new['description']?></div>
    *                           </div>
    *
    *
    *                       <?
    *                           $numb_news++;
    *                           if ($numb_news >4) {
    *                               break;
    *                           }
    *                       }
    *                       //var_dump($folha_news->array_news);
    *                   ?>
    *       tip¹ : 'description' may be null in some rss news.
    *
    */

    class News
    {

        var $rss_url;
        var $rss_parser;
        var $array_news;

        function __construct($url)
        {
            $this->rss_url = $url;
            $this->getNews();
        }

        public function getNews()
        {
            $this->array_news = array();
            $feed_url = $this->rss_url;
            $xml_parser = xml_parser_create();
            $this->rss_parser = new RSSParser();
            xml_set_object($xml_parser,$this->rss_parser);
            xml_set_element_handler($xml_parser, "startElement", "endElement");
            xml_set_character_data_handler($xml_parser, "characterData");
            $fp = fopen("$feed_url","r")
               or die("Error reading RSS data.");

            while ($data = fread($fp, 4096)){ // header+1 new =  approx. 850 bytes, 1 new = 230 bytes
                //echo "linha = ".xml_get_current_line_number($xml_parser)." <br>";
                //if (xml_get_current_line_number($xml_parser) < 2) {
                    xml_parse($xml_parser, $data, feof($fp))
                    or die(sprintf("XML error: %s at line %d",
                        xml_error_string(xml_get_error_code($xml_parser)),
                        xml_get_current_line_number($xml_parser)));
                //}
            }
            fclose($fp);
            xml_parser_free($xml_parser);
            $this->array_news = $this->rss_parser->getNewsArray();
        }

    }
?>