John Blackbourn – @johnbillion

Member Since: December 7th, 2005
Location: Tonbridge, UK; and Torino, Italy
Website: johnblackbourn.com
GitHub: johnbillion
Job Title: Senior WordPress Engineer
Employer: Human Made Ltd
Find me on:

Bio

I’m one of the team of WordPress core developers. I was the release lead for WordPress 4.1 and 4.9.1. I work as an engineer at Human Made.

Previously I’ve worked at Code For The People and WordPress.com VIP.

Contributions Sponsored

John Blackbourn contributes 8 hours per week to the following teams: CLI, Core, Documentation.

Contribution History

Accessibility Contributor
bbPress Contributor
BuddyPress Contributor
Core Contributor
Core Team
Documentation Contributor
Meetup Organizer
Meta Contributor
Plugin Developer
Translation Contributor
WordCamp Organizer
WordCamp Speaker

Activity
Plugins
Favorites
Translations

Closed ticket #50058, in Core Trac:
Improve the local development environment docs

2 days ago
Committed [48192] to Core Trac:
Docs: Improvements to the inline docs for metadata related functions. ...

2 days ago
Created a new ticket, #50489, in Core Trac:
Improve the "Auto-update update" text

2 days ago
Created a new ticket, #50484, in Core Trac:
Incorrect HelpHub URL for getting started

3 days ago
Committed [48184] to Core Trac:
Docs: Miscellaneous docblock improvements. See #49572.

3 days ago
Closed ticket #50468, in Core Trac:
WordPress Amazon Embed code is adding affiliate tracking code when any ...

3 days ago
Posted a reply to Query monitor causes fatal PHP error with no indication why, on the site WordPress.org Forums:
Ah-ha! This might actually be a bug in QM. If a fatal error occurs before…

3 days ago
Posted a reply to Query monitor causes fatal PHP error with no indication why, on the site WordPress.org Forums:
Alright cheers, I'll do some testing and see if I can persuade that stack trace…

3 days ago
Posted a reply to Query monitor causes fatal PHP error with no indication why, on the site WordPress.org Forums:
I don't think it would help, to be honest. I'll do some testing locally to…

3 days ago
Posted a reply to Query monitor causes fatal PHP error with no indication why, on the site WordPress.org Forums:
Unfortunately due to PHP's funky handling of errors there are some situations where you might…

4 days ago
Posted a reply to How to create this cron event?, on the site WordPress.org Forums:
You can create this by adding a PHP Cron event with WP Crontrol. Details are…

1 week ago
Committed [2328560] to Plugins Trac:
Update to version 1.5.5 from GitHub

1 week ago
Posted a reply to Essential plugin for a developer, on the site WordPress.org Forums:
Thank's for the review. I think I'll make that the new tagline for Query Monitor…

1 week ago
Created a new ticket, #50437, in Core Trac:
Add leniency to the overdue check for plugin and theme auto updates

1 week ago
Created a new ticket, #50436, in Core Trac:
Unnecessary DISABLE_WP_CRON check in plugin and theme auto updates

1 week ago
Committed [48101] to Core Trac:
Docs: Fix some documentation errors in bundled themes. See #49572.

1 week ago
Committed [48100] to Core Trac:
Docs: Remove unnecessary variables names from `@return` tags. See #49572.

1 week ago
Posted a reply to Updated to version 1.8.5 breaks all Cron jobs, on the site WordPress.org Forums:
@williamvanwyk Unfortunately that wp-geo-website-protection plugin that you were using contains what appears to be malware…

1 week ago
Posted a reply to Wp_options folder, on the site WordPress.org Forums:
This plugin doesn't use any settings.

1 week ago
Posted a reply to InnoDB or MyISAM, on the site WordPress.org Forums:
I think you have the wrong forum.

2 weeks ago
Posted a reply to Wordfence conflict, on the site WordPress.org Forums:
There are some ways to prevent QM from logging its data but it needs to…

2 weeks ago
Posted a reply to Wordfence conflict, on the site WordPress.org Forums:
This isn't so much a conflict as it is a general issue with debugging plugins…

2 weeks ago
Wrote a comment on the post Dev Chat Agenda for June 17th, 2020, on the site Make WordPress Core:
There's been some renewed interest and movement on adding the ability for users to change…

2 weeks ago
Posted a reply to query monitor and socket connection, on the site WordPress.org Forums:
The availability of the hit and miss counts is dependent on the cache driver providing…

2 weeks ago
Posted a reply to sslverify=false, on the site WordPress.org Forums:
Sorry to hear this but I'm unable to provide support for individual sites. It would…

2 weeks ago
Posted a reply to Updated to version 1.8.5 breaks all Cron jobs, on the site WordPress.org Forums:
Yeah your best bet in this case is to deactivate your other plugins one by…

2 weeks ago
Posted a reply to Cron Each 2 Days, on the site WordPress.org Forums:
You'll need to add a schedule with an interval of two days, if one doesn't…

2 weeks ago
Posted a reply to 403 when switching user by Administrator, on the site WordPress.org Forums:
* Are you using any plugins which change the way that authentication or logging in…

2 weeks ago
Posted a reply to Can We Modify Other Users’ Dashboard?, on the site WordPress.org Forums:
Yep. Settings for features built into WordPress such as screen options, dashboard widgets, etc are…

2 weeks ago
Posted a reply to Cron Job not run until the page open, on the site WordPress.org Forums:
If there's no traffic to your website then your events will miss their schedule. More…

2 weeks ago
Posted a reply to Cron Job not run until the page open, on the site WordPress.org Forums:
This thread is a duplicate of https://wordpress.org/support/topic/cron-job-not-run-until-the-page-open/.

2 weeks ago
Posted a reply to Cron Job not run until the page open, on the site WordPress.org Forums:
Is WP Crontrol showing you any warning messages?

2 weeks ago
Posted a reply to External object cache not in use – Now what?, on the site WordPress.org Forums:
I'm sorry this isn't as clear as it could be, I'm planning on improving the…

2 weeks ago
Posted a reply to DOMException, on the site WordPress.org Forums:
Can you provide some more info please? Where are you seeing this error? Does it…

2 weeks ago
Posted a reply to Error with php 7.4 (Trying to access array offset on value of type bool), on the site WordPress.org Forums:
Thanks. Is this in a Docker container? Or another environment where the uid of the…

2 weeks ago
Posted a reply to Cron events with no actions, on the site WordPress.org Forums:
Most likely these are safe to delete. You can usually Google a cron event name…

3 weeks ago
Posted a reply to Zodiacpress plugin activated but not working, on the site WordPress.org Forums:
This is the wrong forum. Try here: https://wordpress.org/support/plugin/zodiacpress/

3 weeks ago
Posted a reply to Switching to other users in my multisite hasn’t been working for months…, on the site WordPress.org Forums:
Most plugins which change the login URL will break something somewhere, because this isn't fully…

3 weeks ago
Posted a reply to Switching to other users in my multisite hasn’t been working for months…, on the site WordPress.org Forums:
Also caching plugins can sometimes interfere if they're configured a bit too aggressively. Try deactivating…

3 weeks ago
Posted a reply to Switching to other users in my multisite hasn’t been working for months…, on the site WordPress.org Forums:
Sorry you're having trouble. * Are you using any plugins which change the way that…

3 weeks ago
Posted a reply to PHP Cron results logged anywhere?, on the site WordPress.org Forums:
The underlying cron event system in WordPress doesn't change when you trigger it via a…

4 weeks ago
Posted a reply to All Crons on my site are getting stuck, on the site WordPress.org Forums:
That last error is the cause of your problem. You'll need to contact your host…

4 weeks ago
Posted a reply to Updated to version 1.8.5 breaks all Cron jobs, on the site WordPress.org Forums:
Thanks, can you let me know which plugin that is please? I want to make…

4 weeks ago
Posted a reply to Updated to version 1.8.5 breaks all Cron jobs, on the site WordPress.org Forums:
What's the exact error message please? Which version did you update from? Note that WP…

4 weeks ago
Posted a reply to Mystery wp-crontrol installation, on the site WordPress.org Forums:
Possibly installed by your host, or by a one-click installation service if you used that.…

4 weeks ago
Posted a reply to Undefined index., on the site WordPress.org Forums:
Thanks for the report. This is probably due to a plugin or your theme doing…

4 weeks ago
Posted a reply to Blank website when Query Monitor Plugin activated, on the site WordPress.org Forums:
Nope this is not normal. Check your error logs, your server logs, your browser console,…

4 weeks ago
Created a topic, Infinitely recurring “smush_check_for_conflicts” cron events, on the site WordPress.org Forums:
The smush_check_for_conflicts cron event both runs and…

4 weeks ago
Committed [2315190] to Plugins Trac:
Update to version 1.8.5 from GitHub

4 weeks ago
Committed [2315156] to Plugins Trac:
Update to version 1.8.4 from GitHub

4 weeks ago