Matthias Pfefferle (@pfefferle) – WordPress user profile

Bio

A fullstack developer, blogger, podcaster, OpenWeb advocate, citizen of the IndieWeb, working on ActivityPub and IndieWeb for WordPress!

Interests

IndieWeb, Fediverse, ActivityPub, Open Web, Microformats, Webstandards, biking, Home Automation, IoT

WordPress Origin Story

– In 2002 I installed my first blog using the WordPress predecessor b2.
– 2004 I switched to WordPress.
– I worked on my first theme in 2006 and my first plugin in 2007.
– I uploaded a first theme (SemPress) to WordPress.org in 2011.
– Two years later, SemPress was added to the WordPress.com theme directory by Automattic.
– 2015 was my first “Core Contribution” (OEmbed).
– I held my first WordCamp talk in 2016.
– I held my first WordPress Meetup talk in 2019.
– Started working on ActivityPub for WordPress in 2019
– 2023 I joined Automattic to work full time on the OpenWeb/Fediverse

https://notiz.blog/2018/06/19/15-jahre-wordpress/
https://notiz.blog/2023/06/02/20-jahre/

Member Since: December 1st, 2006
Location: Karlsruhe, Germany
Website: notiz.blog
GitHub: pfefferle
Job Title: Open Web Lead
Employer: Automattic
Find me on:

Contribution History

Core Contributor
Hosting Contributor
Hosting Team
Meetup Organizer
Meta Contributor
Photo Contributor
Plugin Developer
Theme Developer
Translation Contributor
Translation Editor
WordCamp Organizer
WordCamp Speaker
WP-CLI Contributor

Activity
Plugins
Themes
Photos
Courses
Favorites
Translations

Posted a reply to Like and Reposts not displayed because of Indieblocks and Webmention settings, on the site WordPress.org Forums:
I am not completely sure how the IndieBlocks plugin works, maybe @janboddez can help here?
6 hours ago
Posted a reply to Account tag pinging issue?, on the site WordPress.org Forums:
@obenland no, not even the base class does parse the template. @aevisia you have to…
2 days ago
Mentioned in [60304] on Core SVN:
Comments: Remove `novalidate` attribute from comments form by default.
5 days ago
Committed [3309819] to Plugins SVN:
Update to version 6.0.2 from GitHub
6 days ago
Committed [3308557] to Plugins SVN:
Update to version 6.0.1 from GitHub
1 week ago
Posted a reply to Problems to see followers, on the site WordPress.org Forums:
Hey @heinzwittenbrink 👋 this is an issue with a broken migration https://github.com/Automattic/wordpress-activitypub/issues/1776 don't worry, this…
1 week ago
Posted a reply to Images no longer attached to Fediverse view of post, on the site WordPress.org Forums:
phew... there is no short answer to that I think 🙄 I suppose that makes…
1 week ago
Committed [3307534] to Plugins SVN:
Update to version 6.0.0 from GitHub
2 weeks ago
Posted a reply to Activity Pub guide, on the site WordPress.org Forums:
We worked on a Checklist that you should find on the Welcome page (or better…
2 weeks ago
Posted a reply to Template Help: Shortcode (or PHP code) to show the reactions, on the site WordPress.org Forums:
We currently only support to add "Reactions" via the Block-Editor, but you can add Block-Areas…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
Can you check what you have chosen as default number for "Media attachments" in your…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
Do you use a shortcode to publish the images?
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
Yes, and perfect too... but that means this is not the issue and I have…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
Can you run this wp eval "var_dump( wp_get_upload_dir()['baseurl'] )" and share the result?
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
No, it is not listed in the post list. But never mind, if it returns…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
It should be the ID of the Attachment post (everything in WordPress is a post…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
oh no, that is no CLI command, sorry for not mentioning that. you would have…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
Can you try to run attachment_url_to_postid( 'https://tlmb.net/blog/wp-content/uploads/2025/04/BigElbowsUniversityChallenge.jpg' ); somewhere on your server and check if…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
I will check why the HTML parser doesn't find the image! Do you run the…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
The code no longer searches for Attachments, as they’ve proven too fragile and unreliable. When…
2 weeks ago
Posted a reply to Media attachment is not the expected one, on the site WordPress.org Forums:
How is the image included? Do you use a plugin to add these? Do you…
2 weeks ago
Posted a reply to Blog becomes slow as a crawl, on the site WordPress.org Forums:
Do you have any idea which plugin it could have been??
2 weeks ago
Posted a reply to Undesired posts appear in the timeline, on the site WordPress.org Forums:
ok, then it is WordPress.com and „someone“ enabled it in the marketing section.
3 weeks ago
Posted a reply to Undesired posts appear in the timeline, on the site WordPress.org Forums:
Hey @danielhhz 👋 WordPress has no „built in“ functionality! You either has to activate it…
3 weeks ago
Posted a reply to WebFinger endpoint is not accessible & PHP warning, on the site WordPress.org Forums:
The check is the one issue, but it should never have a PHP warning 😳…
3 weeks ago
Posted a reply to Buddypress and ActivityPub, on the site WordPress.org Forums:
Hey @earl_d 👋 it depends on how you define "run" :) It runs on a…
4 weeks ago
Posted a reply to Great out-of-the-box integration, on the site WordPress.org Forums:
Thanks a lot @johnfisherman I am glad you like it ☺️
4 weeks ago
Posted a reply to Is it possible to share the content you publish in feed through the friends plg?, on the site WordPress.org Forums:
Hey @sabie1593 👋 Isn't this a question that needs to be discussed in the Friends…
4 weeks ago
Posted a reply to no reactions, on the site WordPress.org Forums:
@krisueu any kind of spam protection? security plugins? it seems to be a random problem,…
4 weeks ago
Posted a reply to no reactions, on the site WordPress.org Forums:
It seems that reactions work: https://krisu.eu/klassenerhalt-st-pauli-bleibt-erstklassig/ So it might be that these mentioned ones are…
4 weeks ago
Posted a reply to no reactions, on the site WordPress.org Forums:
it goes alone and the reactions. Comments work perfectly. Maybe I have to be a…
4 weeks ago
Posted a reply to no reactions, on the site WordPress.org Forums:
After the latest version 5.9.2, the heading Fediverse reactions is no longer visible. You should…
4 weeks ago
Committed [3296479] to Plugins SVN:
Update to version 5.9.2 from GitHub
4 weeks ago
Posted a reply to no reactions, on the site WordPress.org Forums:
Is it only about reactions or do you have the same issue with replies (comments)?…
4 weeks ago
Posted a reply to no reactions, on the site WordPress.org Forums:
Is it about receiving or displaying? Can you see reactions in WP-Admin but not in…
1 month ago
Posted a reply to no reactions, on the site WordPress.org Forums:
Hey @krisueu 👋 have you enabled them in the settings?
1 month ago
Posted a reply to Post nur Bild, Text fehlt, on the site WordPress.org Forums:
@new_joerg gerne :) Dies hier ist doch das Support Forum oder was meinst du? Ich…
1 month ago
Posted a reply to Post nur Bild, Text fehlt, on the site WordPress.org Forums:
Du kannst den "Fehler" im Support Forum des Plugins reporten. Das Plugin sollte keine Captchas…
1 month ago
Posted a reply to Post nur Bild, Text fehlt, on the site WordPress.org Forums:
Hey @new_joerg Schichtwechsel :) Ich hab mir gerade mal deine Seite angeschaut und du benutzt…
1 month ago
Committed [3294264] to Plugins SVN:
Update to version 5.9.1 from GitHub
1 month ago
Committed [3293297] to Plugins SVN:
Update to version 5.9.0 from GitHub
1 month ago
Posted a reply to Avoiding caching ActivityPub content, on the site WordPress.org Forums:
Is there a way to reuse LiteSpeed functions to add the rewrite rules? Maybe a…
1 month ago
Committed [3290686] to Plugins SVN:
Update to version 5.4.1 from GitHub
1 month ago
Posted a reply to Blocked activity, on the site WordPress.org Forums:
Such requests are still coming in though, each user about once every 5mins, so although…
1 month ago
Posted a reply to Blocked activity, on the site WordPress.org Forums:
I am not sure why the remote server is retrying so much, 202 should be…
1 month ago
Posted a reply to Blocked activity, on the site WordPress.org Forums:
Ah, I am sorry we removed that debug info in the latest version! That means…
1 month ago
Posted a reply to Blocked activity, on the site WordPress.org Forums:
Hey @plord12 this message is not sent by the ActivityPub plugin, I search the whole…
1 month ago
Posted a reply to Avoiding caching ActivityPub content, on the site WordPress.org Forums:
I will also work on an integration for the LiteSpeed Cache Plugin, like we currently…
1 month ago
Posted a reply to Avoiding caching ActivityPub content, on the site WordPress.org Forums:
Thanks for the feedback @msaari ! With the next version, we provide an option to…
1 month ago
Committed [3290150] to Plugins SVN:
Updating readme/assets from GitHub
1 month ago