get_post_comments_feed_link() does not work on Pages with default permalinks

[Otto42]

When you use the classic template, or any template that calls the comments_rss_link function on Pages, the resulting link is incorrect if you are using default permalinks.

In get_post_comments_feed_link() there's this code:

if ( '' != get_option('permalink_structure') ) {
...
} else {
	$url = get_option('home') . "/?feed=$feed&p=$id";
}

The "p=$id" is incorrect for Pages, that needs to be "page_id=$id". The link using p= results in a 404 page from Wordpress, since it's specifying a Post which does not exist (it's a Page).

Possible solutions:

• Fix the get_post_comments_feed_link() to work for pages too.
• Change the query mechanism to allow p=ID to pull up pages as well.

Reproduction:

• Create a new clean Wordpress blog, switch to the classic template.
• Make a Page.
• Try the RSS link at the bottom of that Page.

Problem exists in 2.2.1 and trunk.

Support thread reference:
​http://wordpress.org/support/topic/125956

[ryan]

(In [5919]) Fix get_post_comments_feed_link() to work with pages. fixes #4637