I copied the "Headerfooter" plugin into a new plugin "Footer" because it was not developed any more, but the idea behind it and the function is quite good. I am not a developer with deep knowledge of the php-syntax of dokuwiki, but I still hope that someone can help me.
The plugin has the problem of caching. It happens time and again that the wiki text defined in the footer template is not displayed for no apparent reason. In this case only the command "purge=true" in the address line can help, sometimes twice in a row. I have no idea how to correct this.
So, can perhaps anyone give me a hint?