There is this post that never got answered and I wanted to do a similar thing
Something like this in functions.php
So I can see in my footer what template is being rendered.
add_action('wp_footer', 'show_template');
function show_template() {
global $template;
echo '<div style="margin: 0; padding: 10px; background-color: #fff; color: #000; position: fixed; bottom: 0; right: 0; z-index: 9999;">Template: ' . basename($template) . '</div>';
}
But I have been reading that functions.php is not the best place to add things for code organization.
I read that I could make a custom plugin, a MU Plugin or use a service provider. Could someone advise on which would be the best route, and how to go about doing so for said route, I know nothing about setting up either of these options really.