php - Use of aliases to shorten Class namespace -

i have class defined in namespace long name. call writing full name of namespace:

use super\long\name\of\namespace\myclass; $obj = new myclass; 

how can shorten long name of namespace?

i tried following:

use super\long\name\of\namespace short; use short\myclass; $obj = new myclass; 

but myclass not found anymore.