psr-0 autoload

autoload

define("DS", DIRECTORY_SEPARATOR);

set_include_path(
        implode(PATH_SEPARATOR, array(dirname(__DIR__), get_include_path())
        ));
$psr = array(
    '\\' => DS,
    '_' => DS
);

spl_autoload_register(function($class)use($psr) {

            $filename = strtr($class, $psr) . ".php";
            foreach (explode(PATH_SEPARATOR, get_include_path()) as $paths) {
                $paths .=DS . $filename;
                if (is_file($paths)) {
                    require_once $paths;
                    return true;
                }
            }
            return false;
        });