just to get sure:
you have a working single-performance.php, that print out everything you need.
you have a working page-gallery.php with featured image and title that link for now to single-performance.php?
and you wish a link to single-performance.php that only shows the gallery?
if yes, i think this will be the easiest way to solve that would be:
inside page-gallery.php something like that instead of permalink only
add_query_arg( 'gallery_only', 'yes', get_permalink() );
inside your plugin or functions.php add it to the public query variables
function add_custom_query_var( $vars ){
$vars[] = "gallery_only";
return $vars;
}
add_filter( 'query_vars', 'add_custom_query_var' );
inside single-performance.php get value that you pass when it come from page-gallery.php
$my_gallery_only = get_query_var( 'gallery_only' );
use after that if ($my_gallery_only == 'yes')
to switch between your normal-all and gallery-only view
hope that this is what you need and that it works for you
