How to Force Domains use WWW

Many site owners make the mistake of duplicating their site’s home page. They will have the same content for http://www.domain.tld, http://domain.tld, and http://www.domain.tld/index.html. This will result in lost link value and therefore damage the rankings of the site’s homepage. For example you may have your internal links pointing to http://www.domain.tld but outside sites may be linking to http://domain.tld. Therefore you will be diluting the effectiveness of your site.

If you find many links outside the site pointing to both the non-www and the www version, it may be wise to use a 301 re-write rule so all pages will be redirected to the same url.

How to include the 301 re-write rule in your web site

1. Create a .htaccess file. Open notepad, name and save the file as .htaccess (there is no extension).

2. Place this code in your .htaccess file:

Options +FollowSymLinks

RewriteEngine On

RewriteCond %{HTTP_HOST} ^domain\.tld$ [NC]

RewriteRule ^(.*)$ http://www.domain.tld/$1 [R=301,L]

or

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\.domain\.tld [NC]
RewriteRule ^(.*)$ http://www.domain.tld/$1 [L,R=301]
</IfModule>

3. If the .htaccess file already has lines of code in it,

skip a line, then add the above code.

4. Save the .htaccess file

5. Upload the file to the root folder of your server.

6. Test your homepage. Type http://domain.tld, or /www.domain.tld into your browser’s address bar. Any of these urls will now automatically be redirected to http://www.domain.tld

Tip

Whenever exchanging links with other sites or getting incoming links make sure you always use http://www.domain.tld

This will make sure you preserve the link value of your site.

UPDATE: this will also work:

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

Bonus
this will redirect index to home page to make the url somehow clean to look at and prevent bots to index 2 similar page with http://domain.tld/index.php and http://domain.tld/

rewritecond %{the_request} ^[A-Z]{3,9}\ /index\.php[^\ ]*\ HTTP/
RewriteRule ^index\.php$ http://www.domain.tld/? [R=301,nc]

right click save as this link for a wordpress plugin

http://xmodx.com/files/url_to_full.php.7z

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