Xampp was designed not to host a site, only for helping develop sites. However, it is possible to configure the web server (Apache) to host your site. Unfortunately, this comes with many security risks. For example, if your site was my_site.com, some hacker could enter this URL: my_site.com/phpmyadmin, and get taken right to phpmyadmin and see your databases AND MODIFIY THEM! Any application that comes with xampp can be accessed by anyone using your site if you do this! It is better to just sign up with a web hosting partner.