Hope I find the right technical terms to describe what's going wrong.
I wanted a dokuwiki on my domain "mydomain.com/dokuwiki/"
But "mydomain.com" is just a domain without webspace. It is simply mapped on a subfoder of another domain "anotherdomain.de/mydomain/"
so dokuwiki is physically resdiding in "anotherdomain.de/mydomain/dokuwiki"
but is to be accessed via "mydomain.com/dokuwiki/"
To make it work at all I had to add
$conf['basedir'] = '/dokuwiki/';
But then saving a page fails because it changes the URL to
"http://www.anotherdomain.de/dokuwiki/doku.php?id=start" that doesn't exist because it is in
Additionally "anotherdomain.de" is not to be visible as URL at all because I need "mydomain.com" to be displayed.
Excerpt from do=debug:
Hope that helps to fix my problem!