WikkaWiki System Requirements

These are the minimal system requirements to install Wikka on your server:

• Access to a web server with at least 1Mb of free disk space (a fresh Wikka install takes around 700Kb of disk space)
• PHP 4.1 or above (including 5.0 if the mysql (not mysqli) extensions are installed)
• MySQL 3.23 or above (the size of the database depends on your needs)

Source http://docs.wikkawiki.org/SystemRequirements