since a widget is client side and php is server side, this won't won't work.

you'll have some abilities with javascript though.

first thing I would do is recreate the situation by trying to put your page in a widget and detect what browser it renders. I assume it will be the default browser;

If this is the case, the only option you have is to not-show your page if the window size is smaller then a certain dimension.

regards,

The best way to do this is to hook into the widget_text filter:

add_filter('widget_text', 'your_function_here');

In your function, you'll need to do some regex to check for shortcode patterns. You can start by checking out this link:

Function Reference/get shortcode regex « WordPress Codex

It might be simplest just to de-register any existing shortcode handlers, ouput your widget, then restore the handlers.

See WordPress Code: Earlier Shortcodes | Viper007Bond.com for some details on how that's done.

I use the same basic technique for some rather complicated nested shortcodes.

Thanks for the replies - appreciated. Bear with me guys. PHP is not my strong suite ...

@neutralhatter - I appreciate PHP is server side. The shortcode does not trigger a new browser instance; it runs within the widget.

I have been trying to find PHP code that checks the width of the screen; not browser width but - forgive me if I use the wrong word -container width (widget or post/page) as I also think this might be the easiest way, but I can't find a command that would do that check.

@723Media - I was working with the code on that page for a while. I thought it might be the answer, but I think the test may be true when the shortcode is used i.e. whether or not it is within a widget. Anyway, could not get it to work.

@Steve - not sure how this tests whether or not the code is running inside a wodget.

Thanks again for your help.

Will