Simple php autoloader

Autoload.php

<?php

/**
 * Autoload:
 * new A() -> A.php
 * new B1\A1\A -> B1/A1/A.php
 */
class Autoload
{
    protected $_basePath;
    
    public function __construct($basePath = "./")
    {
        $this->_basePath = $basePath;
    }

    public function load($className) {
        $path = $this->getPath($className);
        if (file_exists($path)) {
            require $path;
        }
    }

    protected function getPath($className) {
        return $this->_basePath . DIRECTORY_SEPARATOR .
        str_replace('\\', DIRECTORY_SEPARATOR, $className) . ".php";
    }
}
spl_autoload_register(array(new Autoload(getcwd()), 'load'));