Conditional search-forms and PHP

I have a SEARCH option on my main (header?) menu.

When the end-user clicks on “SEARCH” I wish to do this:

if (is_user_logged_in() )
{
[ivory-search id=”3831″ title=”SUBSCRIBERS-search_v2]
}
else
{
[ivory-search id=”6411″ title=”VISITORS-search_v1″]
}

My Q is this:
The shortcode will be [php_everywhere instance=”1″]. How do I keep track of,
and/or view all the instances so I know I am calling the correct piece of
code? Is there a way to list these instances?

I found another plugin called “Shortcodes in Menus”. I would eventually
like to use this plugin so I can call the php_everywhere shortcode when
“SEARCH” is clicked.