Declaring namespaces @ PHP.

exemploNamespace01.php

<?php
namespace Foo;

class FooClass
{

    protected $name;
    protected $userName;
    protected $password;

    public function setData($name, $userName, $password)
    {
        $this->name     = $name;
        $this->userName = $userName;
        $this->password = $password;

        return true;
    }

    public function getName()
    {
        return $this->name;
    }

    public function getUserName()
    {
        return $this->userName;
    }

    public function getPassword() 
   {
        return $this->password;
   }

}