Slim Framework : redirect to www. in .htaccess

Question

I'm using Slim Framework on my website and I would like to avoid duplicate content by redirecting everything to "www." but I don't know what to modify in .htaccess to do that.

The original .htaccess for Slim Framework is :

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [QSA,L]

Thank you

Answer 1

Try:

RewriteEngine On
#non-www to www
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www%{HTTP_HOST}%{REQUEST_URI} [NC,L,R]
#end of non-www to www rule
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [QSA,L]