.htaccess is referral from this redirect code example

Example 1: htaccess redirect to https

RewriteEngine On
RewriteBase /
RewriteCond %{HTTPS} !=on
RewriteCond %{HTTP_HOST} ^yourdomain\.com [OR]
RewriteCond %{HTTP_HOST} ^www\.yourdomain\.com
RewriteRule .* https://yourdomain.com%{REQUEST_URI} [R=301,L]

Example 2: htacces redirect

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