inc/functions/info.php
This is actually a collection of functions put in one file for laziness. The functions are used in Special:Info.
version() shows the version of Sofawiki
currentdate() shows the current date.
currentuser() shows the name of the current user.
currentskin() shows the current $skin value
currentname() shows the name of the current page (should be updated)
currenturl() shows the url of the current page
currentlanguage() shows the current $lang value
countpages() shows the number of current pages
countrevisions() shows the number of revisions
functions() returns a list of all installed functions
parsers() returns a list of all installed parsers
skins() returns a list of all installed skins
templates() returns a list of all installed templates