Phoca Documentation is Joomla! CMS component. Since Joomla 4, Phoca Documentation is not more a component but template override. It displays Joomla's articles and categories as a documentation site, e.g. as User Manual, User guide, Help, etc.
Requirements:
- Joomla 1.5, 2.5, 3, 4 or any later version
- PHP 5, 7, 8 or any later version. See Joomla! requirements for each version.
For more information about changes in Phoca Documentation in Joomla 4, see following article: Phoca Documentation - Joomla 4 - Template Override