Ich vermute, das kommt von einem anderen Theme oder Plugin. Wenn du mit ein Beispiellink schickst, schaue ich mir das gerne an.

If you remove the function, the _last_update_id will be removed, too.

You can open the feed on any machine, e.g. localhost:80/feed

I still use the same function on Travel-Dealz.de and it works well. Try to remove the __NAMESPACE__ from the add_action and add_filter function, and rename the functions to mytheme_check_post_update and mytheme_feed_guid.
add_action( 'post_updated', 'mytheme_check_post_update', 10, 3 );
add_filter( 'the_guid', 'mytheme_feed_guid', 10, 2 );
Perhaps that is the issue.
Otherwise, send me your functions.php via Email.

I really added the function and did the steps as explained.

If you remove the function. Should the last updated ID stay? I guess it should. Just asking to double-check because I removed the snippet as it didn’t work.

I can try on my local machine with default theme and without plugins. Perhaps something is breaking the function from working.

Is there a way that I can see the rss feed on localhost? Because right now I am using a site to fetch the rss feed to check the ID. But with localhost, I can’t add the site to lookup the rss feed.

Did you check your RSS feed if the _last_update_id is present?

I changed an old post publish date to „today“.

The post is now in the top, on the first page. Unfortnately, feedly and other RSS feed websites didn’t see it as a new post.

Is the function perhaps out of date? If so, can you please look into it. That would be great.

There are other plugins out there, but yours looks very minimal and I love that.

habe das Plugin gerade entdeckt und es ist genau das, was ich gebraucht habe.

Danke für deine Arbeit. 🙂

Beste Grüße
Daniel

Alles Gute und schöne Grüße
Bill

Hallo Peter,

du kannst einfach das CSS überschreiben:

a[rel*=sponsored]:after {
content:"🛒"
}