autoloader.php

<?php

# Autoload that works only with _ namespace
if (!spl_autoload_register(function ($class) {
	if (substr($class, 0, 2) !== '_\\')
		return;
	$class = (string)str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 2));
	$file = ROOT_PATH . '/_core/' . $class . '.php';
	if (file_exists($file))
		include $file;
})
)
	die('Cannot register autoload function for project namespace');