OptInt PmWiki . ... When dealing with file or path variables, one has to recognize the difference between working with URLs and files on disk. ... The $ScriptUrl and $PubDirUrl variables are used to tell a browser , connecting via the webserver, how to execute the pmwiki script ( $ScriptUrl ) and the base url for getting files from PmWiki's pub/ directory ( $PubDirUrl ). ... This variable is a string that gives a local path to a directory where the pmwiki engine can create temporary files etc. ...