php 5.3 autoload lambdA

PHP autoload lambda

<?php
spl_autoload_register(function($className)
{
    $fileName = str_replace('\\', '/', ltrim($className, '\\')) . '.php'; 
    
    if (file_exists($fileName)){
        require $fileName;
        return class_exists($className, false);
    }
    return false;
    
});