For the neopagan religion and religious movement, see Wicca

Wicca

Wicca , is a modern Pagan religious movement. Developing in England in the first half of the 20th century, Wicca was popularised in the 1950s and early 1960s by a Wiccan High Priest named Gerald Gardner, who at the time called it the "witch cult" and "witchcraft," and its adherents "the Wica."...

.

WikkaWiki (often shortened as Wikka) is a free

Free software

Free software, software libre or libre software is software that can be used, studied, and modified without restriction, and which can be copied and redistributed in modified or unmodified form either without restriction, or with restrictions that only ensure that further recipients can also do...

, lightweight, and standards-compliant

Standards-compliant

Standards-compliant is a term often used in describing websites and user agents' relative compliance with web standards proposed by the World Wide Web Consortium ; also used for emphasizing that one doesn't use proprietary methods or features of those browsers to ensure interoperability...

 wiki engine. Written in PHP

PHP

PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document...

, it uses MySQL

MySQL

MySQL officially, but also commonly "My Sequel") is a relational database management system that runs as a server providing multi-user access to a number of databases. It is named after developer Michael Widenius' daughter, My...

 to store pages. WikkaWiki is a fork of Wakka Wiki

WakkaWiki

WakkaWiki is a very small wiki engine written in PHP that is easy to install, hack, and maintain. It was originally developed by Hendrik Mans, creator of the PlanetCrap discussion community, with help from Carlo Zottmann....

 to which a number of new features have been added. It is designed for speed, fine-grained access control

Access control

Access control refers to exerting control over who can interact with a resource. Often but not always, this involves an authority, who does the controlling. The resource can be a given building, group of buildings, or computer-based information system...

, extensibility

Extensibility

In software engineering, extensibility is a system design principle where the implementation takes into consideration future growth. It is a systemic measure of the ability to extend a system and the level of effort required to implement the extension...

, and security

Computer security

Computer security is a branch of computer technology known as information security as applied to computers and networks. The objective of computer security includes protection of information and property from theft, corruption, or natural disaster, while allowing the information and property to...

, and is released under the GNU General Public License

GNU General Public License

The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

.
In 2003, the development of Wakka Wiki

WakkaWiki

WakkaWiki is a very small wiki engine written in PHP that is easy to install, hack, and maintain. It was originally developed by Hendrik Mans, creator of the PlanetCrap discussion community, with help from Carlo Zottmann....

 came abruptly to an end, although a large community of users and contributors was still posting bugfixes, extensions, and new functions.