To run your own copy of DokuWiki you will need the following:
DokuWiki will run on any Webserver supporting PHP. Most users use Apache but many others including IIS, lighttpd and Nginx are known to work.
PHP needs to be at least Version 4.3.3 but for security reasons at least 4.3.10 should be used. PHP 5 will work fine, too.
For resizing images either the PHP LibGD extension or Image Magick should be installed.
DokuWiki should work in PHP's Safe Mode, but depending on your hosting configuration you may need to use the safemodehack option.
Any browser of the last few years should work. Firefox should be used for best experience.
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 3.0 Unported