.htaccess用多个$ _GET变量重写

Question

I'm really struggling to write my .htaccess file properly. I would like the following to happen:

1. x.domain.com --> redirect to --> domain.com/index.php?id=x
2. If there is a $_GET variable on the original URL, transfer this to the second URL: x.domain.com/?y --> redirect to --> domain.com/index.php?id=x&y

So far, I've managed to get as far as mentioned in the 1st point .

But can't work out where to go next to achieve the 2nd point .

Do I need to write new lines for a separate rule, or amend the current lines?

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.
RewriteCond %{REQUEST_URI} !index\.php
RewriteCond %{HTTP_HOST} ^(.+?)\.domain\.com$
RewriteRule .* http://www.domain.com/index.php?id=%1 [L,P]

Any help appreciated.

Answer 1

...
RewriteRule .* http://www.domain.com/index.php?id=%1 [L,P,QSA]

You're looking for the QSA (query string append) flag, which appends the query string back to the rewritten URL.