Make multiple URLs behave as home page

Question

I want /url1, /url2, /url3, to all behave as though the homepage / was accessed, and to have the homepage rendered without redirecting away from /urlx. In fact, if every URL someone tried to access was rendered as the home page, that would be great.

No need for SEO advice, or learning about redirects to the canonical page. This is a special use-case and I need this specific outcome.

I have tried resetting the query by hooking in to pre_get_posts() and calling wp_reset_query(), but that doesn't change any functionality on any page.

add_action( 'pre_get_posts', function($query) {
    wp_reset_query();
} );

Even if I could get every page on my site to render as the home page without redirecting, I could make the rest of the changes I need. Can anyone help?

Answer 1

Just intercept the hook to determine which template to use. To make all pages act as the homepage:

add_filter( 'template_include', function($template) {
    return get_template_directory() . '/index.php';
});