I have no clue where to find how to do that. Is it even possible? On 1 domain? Or I just must buy another domain with domain address "info.website.com" ?
Or if you can send me website with informations about htaccess. I know I must add code act. for stackoverflow.com rules.
Use this rule in .htaccess:
RewriteRule info.website.com www.website.com/info/index.php [L,R=301]
Also you need to create a subdomain "info" on your web server.