(PHP) links/titulos aleátorios em blogspot - posts random

<?php


 /*
 *  Copyright (c) 2012 [iPs]TeaM
 *  Bruno da Silva (email@brunodasilva.com)
 *  Pegar links e títulos de post aleatoriamente em blogspot
 *
 * www.brunodasilva.com
 * www.ips-team.forumeiros.com
*/



    $url = $_GET['url'];

    $url .= "/feeds/posts/default";

    $xml = simplexml_load_file($url);

    $total =(int) $xml->children('openSearch', true)->totalResults;

    $aleatorio = mt_rand ( 25, $total );

    pegarLigações( ($aleatorio - 25), $aleatorio )  ;

    function pegarLigações( $inicio, $fim )
    {
        $url = $_GET['url'];

        $url .= "/feeds/posts/default";

        $url .= "?start-index=$inicio&amp;max-results=$fim";

        $xml = simplexml_load_file($url);


        for ($i = 0; isset( $xml->entry[$i]->title) ; $i ++) {

            echo $xml->entry[$i]->title;
            echo $xml->entry[$i]->link[4]["href"] . "<br/>";

        }

        return true;
    }


?>