Redirecting the user to another page?

Question

PHP

There is a main site and a couple of sites that lay at its root, that is:
test.ru - Main site
test.ru/doma
test.ru/bary
test.ru/restorany
and so on.
What condition should be written in htaccess so that a person following a link for example
test.ru/yd/restorany
redirects him to test.ru/restorany ( It turns out without YD)
which channel the request came from.
mychina.kz/china2/?utm_source=vk_r&utm_medium=cpc&...
Such conditions must be specified for each of the above sites.
Help good people =)

Answer 1

RewriteEngine on
RewriteRule ^yd/(.*?)$ /$1