.htaccess - url rewriting add prefix www with htaccess -

i created website symfony , want rewrite url. url apprears this: domain.com/web/

i removed web/ adding code .htaccess file:

<ifmodule mod_rewrite.c>     rewriteengine on     rewritecond %{request_filename} !-f     rewriterule ^(.*)$ web/$1 [qsa,l] </ifmodule> 

this worked perfectly.

my target add www. prefix. solved adding code:

rewritecond %{http_host} !^www\. rewriterule ^(.*)$ http://www.%{http_host}/$1 [r=301,l] 

the result ok. in fact,

• the url domain.com becomes www.domain.com (perfect!!!)
• the url domain.com/something/ becomes www.domain.com/something/ (perfect!!!)
• the url domain.com/web/ stays same (it's url not change)

is there idea redirect domain.com/web/ www.domain.com???

thanks...

this behavior caused condition existing files won't rewritten:

 rewritecond %{request_filename} !-f