combining force-www with clean urls - mod-rewrite

Question

I have this mod-rewrite in my htacces which enables some clean urls;
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteBase /
### LANGUAGE REDIRECT RULES start
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(en|nl)-?()?\/(.*\/?)$ index.php?language=$1&region=$2&symphony-page=$3&%{QUERY_STRING} [L]
### LANGUAGE REDIRECT RULES end
### FRONTEND REWRITE - Will ignore files and folders
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*\/?)$ ./index.php?symphony-page=$1&%{QUERY_STRING} [L]
</IfModule>
Now I would like to also force www, so I extended the code:
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
RewriteBase /
### LANGUAGE REDIRECT RULES start
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(en|nl)-?()?\/(.*\/?)$ index.php?language=$1&region=$2&symphony-page=$3&%{QUERY_STRING} [L]
### LANGUAGE REDIRECT RULES end
### FRONTEND REWRITE - Will ignore files and folders
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*\/?)$ ./index.php?symphony-page=$1&%{QUERY_STRING} [L]
</IfModule>
However this results in none of my pages being found.
FYI A language redirect adds country-code parameters to the url on load.
How do I get these rules to play along?

Answer 1

You're probably missing the query string:
RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [QSA,L,R=301]
You can also use the QSA flag in your other rules, e.g.:
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*\/?)$ ./index.php?symphony-page=$1 [L,QSA,B]
I also added B because you're using the backreference in a query string, so it needs to be escaped.
See the documentation.