We given the detailed information about how to add www to domain name through apache or htaccess. Using apache rule we can achieve this.
Just use following code in apache configuration file or .htaccess file.
If you are using the shared hosting then please go with only .htaccess file.
Just copy paste following code in .htaccess file.
<IfModule mod_rewrite.c>
Options +FollowSymlinks
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\.wordpressapi\.com$ [NC]
RewriteRule ^(.*)$ http://www.purabtech.in/files/$1 [L,R=301]
</IfModule>
