I have a web server using cpanel and I would like to use a custom domain on one folder for an api. So if I created a folder called api in the public_html folder then the path to that folder would be www.example.co.uk/api/(some php file). How could I change it so the folder would become a custom domain of api.example.co.uk/api/(some php file).
I have looked at a few options but don't really know the best way. I have tried to add a htaccsess file to the api folder and then create a rewrite rule to rewrite the www to api.
I also then looked at creating sub domains with the path to the api folder.
I have read that creating a A record on the server could work but I'm not quite sure how to do this. I know it can be done as most apis use some custom domain like facebooks graph api. (i.e https://graph.facebook.com/youtube/)