Disable only the main feed?

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It’s possible to make a site totally inaccessible via feeds (RSS, Atom, RDF) with a function like this:

function itsme_disable_feed() {
    wp_die( __( 'No feed available, please visit the <a href="'. esc_url( home_url( "https://wordpress.stackexchange.com/" ) ) .'">homepage</a>!' ) );
}
add_action('do_feed', 'itsme_disable_feed', 1);
add_action('do_feed_rdf', 'itsme_disable_feed', 1);
add_action('do_feed_rss', 'itsme_disable_feed', 1);
add_action('do_feed_rss2', 'itsme_disable_feed', 1);
add_action('do_feed_atom', 'itsme_disable_feed', 1);
add_action('do_feed_rss2_comments', 'itsme_disable_feed', 1);
add_action('do_feed_atom_comments', 'itsme_disable_feed', 1);

But that disables feeds for the entire site i.e. the main feed, feeds for categories, tags, comments, posts, pages, custom post types, etc.

How do I disable just the main feed and the main comments feed of the site? i.e. only make site.com/feed/ and site.com/comments/feed/ inaccessible.

Simply hiding feed using something like this (below) isn’t an option:

remove_action( 'wp_head', 'feed_links_extra', 3 );
remove_action( 'wp_head', 'feed_links', 2 );

5 Answers
5

Very, very quick unscientific research suggests that there is only one query_var set for the main feed. Other feeds such as category, tag, author feeds have more than one query_var. Thus the following should kill the main feed but leave others intact. 

add_filter(
  'pre_get_posts', 
  function($qry) {
    if ($qry->is_feed()) {
      $fvars = array_filter($qry->query_vars);
      if (1 == count($fvars)) {
        wp_die( __( 'No feed available, please visit the <a href="'. esc_url( home_url( "https://wordpress.stackexchange.com/" ) ) .'">homepage</a>!' ) );
      }
    }
  },
  1
);

To remove the main comment feed, you need a small edit to check for the presence of $fvars['withcomments'].

add_filter(
  'pre_get_posts', 
  function($qry) {
    if ($qry->is_feed() ) {
      $fvars = array_filter($qry->query_vars);
      if (1 == count($fvars) || isset($fvars['withcomments'])) {
        wp_die( __( 'No feed available, please visit the <a href="'. esc_url( home_url( "https://wordpress.stackexchange.com/" ) ) .'">homepage</a>!' ) );
      }
    }
  },
  1
);

Be warned: Barely tested. Possibly buggy. Caveat emptor. No refunds.

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