autoload.php

<?php

include_once '/pearPath/Symfony/Component/ClassLoader/UniversalClassLoader.php';

use Symfony\Component\ClassLoader\UniversalClassLoader;

$loader = new UniversalClassloader();

$loader->registerNamespaces(
array(
  'YourVendor' => '/path/to/your/new/files',
  'Symfony' => '/usr/share/php', // register Symfony Namespace
));

$loader->register();