A web hosting space with PHP and MySQL. If you have none, check Piwigo recommended hostings.
- a webserver like Apache, Lighttpd or Nginx
- MySQL 5 or MariaDB equivalent
- PHP 5.2
- ImageMagick (recommended) or GD
- 30MB storage for the software, and much more for your photos
- an FTP client like FileZilla
- and, well, a still camera!