Add www to urls and remove index.html/index.htm on urls

.htaccess

Options +FollowSymlinks -MultiViews
RewriteEngine on

RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{REQUEST_URI} ^(.*/)index\.html$ [NC]
RewriteRule . http://www.%{HTTP_HOST}%1 [R=301,NE,L]

RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule . http://www.%{HTTP_HOST}%{REQUEST_URI} [NE,R=301,L]

RewriteCond %{REQUEST_URI} ^(.*/)index\.html$ [NC]
RewriteRule . %1 [R=301,NE,L]

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