Question

I know modules like Mobile Tools can do what I want – but they don’t work with Pressflow or Varnish.

So, what I’m hoping to do is assign the sitewide theme based on the url used to access it. For instance:

example.com <– This gets the standard, desktop theme

m.example.com <– This gets the cool shiny iphone-optimized theme with flashy javascript etc

I dont’ want multisite because the content is the same.

I don’t want a new entry in domain access because the content is already written and it would (presumably) be a huge hassle to go back and assign it all to the new domain.

There’s a Domain Context plugin for context, but it says it loads too late in the flow to be able to change the theme.

Answer 1

We ended up solving it with the recommendation from this thread:
http://drupal.org/node/984128#comment-3766156

if (isset($_SERVER['HTTP_HOST'])) {
   if (stristr($_SERVER['HTTP_HOST'],"stage")) {
                $GLOBALS['custom_theme'] = 'bar_stage';
    } 
}