Use of namespaces @ PHP.

usandoNamespaces.php

<?php
require_once 'Foo/FooClass.php';
require_once 'Bar/FooClass.php';

use Foo\FooClass;
use Bar\FooClass as BarClass;

$foo = new FooClass();
$bar = new BarClass();


if ($foo->setData('Fulano de Tal', 'fulanodetal', 'qwert')) {
    echo $foo->getName()  . ' saved.';
}

$bar->showDifference();