are these rewrite rules correct to archive following things? - php

Question

i wanted to
redirect all users to domain with WWW
im using codeigniter so wanted to remove index.php from url's
prevent access to index.php and redirect to domain name if someone request domain/index.php
wanted to 301 redirect all pages
so these are the lines i came up with .htaccess
RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} (.*)$
RewriteRule ^(.+)/$ http://%{HTTP_HOST}/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?$1 [L]
RewriteCond %{THE_REQUEST} ^.*/index\.php
RewriteRule ^(.*)index.php$ http://%{HTTP_HOST}/$1 [R=301,L]
Are these rules correct to do what i wanted to do? is there better ways to do this?
Regards

Answer 1

I have made some changes and removed some redundant code. Here is your modified .htaccess:
Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?$1 [L,QSA]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s(.*)/index\.php [NC]
RewriteRule ^ /%1 [R=301,L]
Also make sure your css, js, images files always use absolute path instead of relative one i.e. path to js, css, images should either start with http:// or /.