将http：//添加到http：www。在codeigniter网站

Question

我有一个网站http://dulaboratories.com/。我之前需要添加http://www.dulaborties.com。我试图从.htaccess更改它，但它对我不起作用。

RewriteEngine on

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

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]  e