Load and use classes without namespaces

[Lawrence Lagerlof]

It's possible to create a package for a class without a namespace, and use it in my scripts like a common class?

eg:

<?php
require_once 'vendor/autoload.php';


$mc = new MyClass();     // instead of $mc = new Something\MyClass()

This is because I am still using php 5.2. For legacy reasons I can't upgrade php to 5.3 or beyond).