Codeigniter htaccess重定向到非www

Question

I am using codeigniter.I want to redirect all users from www to non-www. I mean if user does a request to http://www.example.com it should be redirected to http://example.com or http://www.example.com/url/1/2 to http://example.com/url/1/2

How can I achive this ?

My htacess code:

RewriteEngine On
RewriteCond %{REQUEST_URI} ^/system.*
RewriteRule ^(.*)$ index.php/?$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ index.php/?$1 [QSA,L] 

Answer 1

Try this way,

RewriteEngine On
RewriteCond %{REQUEST_URI} ^/system.*
RewriteRule ^(.*)$ index.php/?$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]