It should be quite easy to export Outlook appointments into .ics format and let third party applications like phpicalendar stitch these snippets together into a coherent view. Unfortunately older Outlook versions are not supporting ics export. After several frustrating attempts (installing VB macros that are buggy and software like freemical that misses important fields) I finally wrote my own exporter that includes also a category filter as otherwise too may entries will have to be parsed by phpicalendar.
ol2ics.zip includes the source perl script including a compiled windows version.
|wj_olics.txt|
The ics file may then be uploaded to the phpicalendar directory using a wput call like
wput –reupload my.ics ftp://name:password@domain.de/calendar/my.ics