.htaccess - htaccess from www to non-www bringing variable in session/cookie -

.htacces redirects www.example.com example.com (same domain without www.)
returning visitor have in user-agent visitor_id cookie.
want bring value through domains within cookie or session.
tried this, cookie created www domain

rewritecond %{http_host} ^www.example.com rewritecond %{http_cookie} visitor_id=([^;]+) rewriterule .* - [c,env=foo:%1] rewriterule ^(.*) http://example.com [l,r=301] header set set-cookie "visitor_id=%{foo}e; path=/" env=foo 

moreover environment variable works on localhost (apache 2.4.2, win32), online (apache 2.2.25, linux) value in cookie "%{foo}e" instead of expected number.

also tried mod_session_cookie can't find practical examples.

how redirect through domains, bringing visitor_id in cookie or session cookie?

since, environment %{env} variables not behaving consistently across different apache versions, suggest setting cookie rewriterule using [co] cookie flag.

rewritecond %{http_host} ^www\.example\.com$ [nc] rewritecond %{http_cookie} visitor_id=([^;]+) [nc] rewriterule .* $0/vid/%1 [c] # appends cookie value url rewriterule ^(.*)/vid/(.*)$ http://example.com/$1 [l,r=301,co=visitor_id:$2:.example.com:14400:/] 

here list of changes made .htaccess file:

• rewritecond matches case-insensitive (using [nc])

• the dots in %{http_host} condition have been escaped \. ( . matches char otherwise)

• the first rewriterule appends visitor id (captured %1) url (captured $0)

• the last rewriterule parses visitor id url (as $1) , performs permanent [r=301] redirect http://example.com along writing cookie named visitor_id using [co] flag.

the syntax of cookie rewrite flag follows

[co=name:value:domain:lifetime:path:secure:httponly] 

where specifying values name, value , domain mandatory. lifetime defaults 0 means cookie persists current browser session only. path defaults /, secure , httponly false.

the [co] flag used specifies domain .example.com cookie becomes accessible hosts under example.com domain. lifetime specified 14400 in minutes , amounts 10 days.