Open or create a new file .htaccess in public_html folder with content as sample below:
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^yourdomain.com [NC]
RewriteRule ^(.*)$ http://www.yourdomain.com/$1 [L,R=301]
NOTE: Replace yourdomain.com with your own domain name
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^yourdomain.com [NC]
RewriteRule ^(.*)$ http://www.yourdomain.com/$1 [L,R=301]
NOTE: Replace yourdomain.com with your own domain name
Updated on: 04 / 12 / 2018