which::registerNamespace

static function registerNamespace($namespace, $path)
{
	$namespace = trim($namespace, "\")."\";
	$namespace = strtolower($namespace);

	$path = rtrim($path, "/\");
	$depth = substr_count(rtrim($namespace, "\"), "\");

	self::$namespaces[$namespace][] = [
		"path" => $path,
		"depth" => $depth,
	];
}