Select theme via URL when logged out?

[Melonking]

Is it possible to provide people with a URL that will load a particular theme instead of the regular default theme?

A small number of my forums users need to use an accessibility-enhanced theme; it works great when they are logged in, but when they log out or are visiting the forum when their login has expired; they are stuck with the default theme which causes issues.

Is there a way to select the theme via URL when logged out? Something like https://forum.mysite.com/theme=2 ?
This would allow users to bookmark the theme of their choice to use for logging in.

[Aleksi "Lex" Kilpinen]

If you allow users to select their theme, then /index.php?theme=X where X is the theme ID should work.

[Melonking]

Oh wow! My example idea was almost exactly the real code    Thank you; I kinda expected the answer to be a resounding no!!