pontocinza

When a post is published or updated, Internal Pingback Comments scans its content, finds all internal links, and creates a pingback-style comment on each linked post. It mimics native WordPress pingback behavior but eliminates the need for XML-RPC or outbound network requests.
Works with posts only. No settings page, no configuration.
How it works
The plugin parses post content with DOMDocument — not regex — so it handles real-world HTML correctly: nested tags, encoded entities, relative and protocol-relative URLs. For each internal link found, it inserts a pingback comment on the target post. The comment includes a short excerpt from the source post, with image captions (figcaption) stripped so they do not bleed into the pingback text.
Duplicate detection is precise: the source permalink is stored as private comment meta, and the plugin queries that meta before every insert. Republishing or updating a post never creates duplicate comments. New links added to an existing post will generate their own pingbacks on the next save.
What the pingback looks like to your theme
The comment is stored with <code>comment_type = 'pingback'</code> and auto-approved. Your theme renders it exactly as it would render a native pingback. If your theme does not display pingbacks, the comment will be stored in the database but remain hidden on the front end.
<h3>Disclaimer</h3>
This plugin is provided “as is”, without warranty of any kind. While best efforts have been made to ensure reliability and security, the author is not liable for any damages or losses resulting from its use.

Internal Pingback Comments

Detects internal links in posts and automatically inserts a pingback-style comment on each linked post. No XML-RPC required.

Matthias Pfefferle

David Shanske

IndieWeb

When you link to a website you can send it a Webmention to notify it and then that website may display your post as a comment, like, or other response, and presto, you’re having a conversation from one site to another!
A <a href="https://www.w3.org/TR/webmention/" rel="nofollow ugc">Webmention</a> is a notification that one URL links to another. Sending a Webmention is not limited to blog posts, and can be used for additional kinds of content and responses as well.
For example, a response can be an RSVP to an event, an indication that someone “likes” another post, a “bookmark” of another post, and many others. Webmention enables these interactions to happen across different websites, enabling a distributed social web.
The Webmention plugin supports the Webmention protocol, giving you support for sending and receiving Webmentions. It offers a simple built in presentation.

Webmention

Easiest way to integrate Webmentions!

This is fantastic. I joined indieweb a few days ago. Last night I wanted to know "So what actually does the technical implementation of a WebMention look like?". I am now working on improving my understanding and perhaps I'll create some documentation that I find easier than the w3c spec or a WP plugin.

Great work, very patient team.

Wonderful

A good plugin that does something very useful. Love the indieweb and Matthias Pfeferle does such great work

Internal Pingback Comments vs Webmention