I am trying to write a little plugin which allows me to add a different theme to each page. well.. still trying.. 😉

code: http://pastebin.com/dP1GH43E

When I put return 'mytesttheme'; at the end it works just perfect!
when I add an ID ($page_theme = get_post_meta('66', [...]) it also works..

when I write echo $page_theme.', '; before the return, it outputs: , , , mytesttheme, mytesttheme, mytesttheme, mytesttheme,

The empty spaces are the problem I think.

in wp-backend it shows “mytesttheme” as post meta content in wp-core post meta content box.. so the saving works as it should..

Any ideas how to solve the problem? :S