htaccess使用last参数重写url

I have a query on htaccess i need to rewrite a url like below example

www.example.com/parameater1/parameater2/parameater3/name=xyz

i need something like below

www.xyz.example.com/parameater1/parameater2/parameater3

i tried the below code

RewriteCond %{HTTP_HOST} ^www\.([^.]+)\.example\.co\.uk$
RewriteRule ^(.*)$ "http://www.example.co.uk/test/$1/$2/$3?user=%1" [P]

but unable to resolve using the above code

Not best, but should work.

RewriteRule ^([^/]*/[^/]*/[^/]*)/name=(.*)$ http://www.$2.example.com/$1 [R=301,L]