While not impossible, juggling themes like that is quite fragile and rarely used out of special contexts (development, theme demo’s, etc). In your situation I would probably just consolidate it on one theme and conditionally output different stylesheet for the section of the site that needs it. It would not be hugely different in result, … Read more
Deleting all Options on theme switch
change theme when on mobile and also on Ipad portrait view
It seems that you are executing updateTheme() in every page load. To execute tasks only on activation you should hooke the updateTheme() function to the register_activation_hook action hook: register_activation_hook( __FILE__, ‘activation_callback’ ); function activation_callback() { //The code inside this function is executed only on plugin activation $theme=”twentyeleven”; //SET the value of $theme to whatever you … Read more
Show child theme for users on specific IP
I have different Point of View on that, and my solution is plugin-centric: A mobile theme is for the user’s ease-by-default, and should not for a user’s ease-by-choice. Take the scenario: a mobile theme is highly optimized a mobile theme is designed with less resources (it serves lesser dev. resources to the user) a mobile … Read more
Change the user role based on login or theme switch
Best practice is to copy your live site onto a staging site, where you can apply the new theme and make whatever edits you need to, then copy those settings back over to your live site. You will “lose” your widgets no matter what theme you switch to. If you are using widgets that are … Read more
Is the date when a theme was activated stored?
Likely your code is somehow breaking on the new widget handling methods, which save old widget layouts when theme switches occur. http://wordpress.org/news/2011/11/wherefore-art-thou-widgets/ Most likely, you’ll have to switch themes before adjusting the widgets in it, since widgets don’t survive theme switches anymore, or at least, will be restored from older settings after a theme switch.