Add feed to a custom page

Question

I have searched and found a lot of people asking about how to add a custom rss feed for custom post types/taxonomies. However that's not the problem right now.

I have 2 extra pages on my site that looks like the default index page (with loop and stuff), the only difference is that they have a different orderby. And I want a feed for those pages too. Putting /feed behind those pages returns a Comments feed with no items. How come? The code of those pages are almost identical to index.php and the feed link works fine there.

I understand there's a add_feed function. But I don't want a new feed type, just the default one is fine.

Answer 1

The only way to accomplish this would be to add in new rewrite rules for these urls. There are a bunch of different ways to accomplish this, but here's one example:

<?php 
add_filter( 'generate_rewrite_rules', 'me_filterRewriteRules' );

function me_filterRewriteRules( $wp_rewrite ) {
    $newRules = array();
    // Replace [your-slug] with the slug of your page
    $newRules['[your-slug]/feed/?$'] = 'index.php?feed=rss2';

    $wp_rewrite->rules = $newRules + $wp_rewrite->rules; 
}
?>

You'll need to add a new rule with the appropriate related query strings for each page you'd like to add a feed to.

Answer 2

MikeNGarret's answer might work, I did not understand it though so I went with an alternative apporach. What I did was make a blank new page template instead, and coded it like a RSS/XML page with my new query.