You can follow these 2 Methods for redirect wordpress website from http to www
Method: 1 For Any Website
Step: 1 Go to Cpanel and Click on setting
Step: 2 Now enable Checkbox of hidden files
Step: 3 Refresh your Cpanel and go inside public_html here you see .htcess files you jst replace all available code to below code
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
Step: 4 If you don’t have .htaccess files then create a file name with .htaccess
and paste above code and save them
Step: 3 Now Refresh Your Website.
That’ It.
Method: 2 For Any WordPress Website
Step: 1 Go to Settting
Step: 2 General Setting Here You see
WordPress Address (URL) and Site Address (URL) change http:// to http://www and update them
Step: 3 Now Refresh Your Website.
That’ It.