How Do I Redirect All Traffic to www.MySite.com?

If I visit my home page by entering example.com into my browser's address bar, my home page URL is example.com.

If I visit my home page by entering www.example.com into my browser's address bar, my home page URL is www.example.com.

If I visit my home page by clicking on an internal link, my home page URL is www.example.com/index.php.

Isn't this bad for the search engines?

Shouldn't I redirect all traffic to www.example.com?

If so, how do I do it in an SEO-friendly way?

 

You can 301 redirect all visitors from non-www to www version of your domain name using the following snippet that you need to place in your .htaccess file:

RewriteEngine On
RewriteBase /

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

Code (markup):

Please note: If you already have the first two lines, then just skip those and DO NOT paste them again.

As for your index.php version of url... I don't think that could be a problem, almost any site has index.html or index.php or default.htm or whatever their index page is. But I guess something could be theoretically done on that end also...

Cheers.