<?php require_once __DIR__ . '/Underscore/Underscore.php'; require_once __DIR__ . '/Underscore/Bridge.php'; class_alias('Underscore\\Underscore', '_'); // register class forgery as autoloading function spl_autoload_register(function ($classname) { try { // by your powers combined! return _::forge($classname); } catch (RuntimeException $e) { // ...we failed to summon Captain Planet :( return false; } });