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

Committed [48695] to Core Trac:
Docs: Various fixes and improvements to inline documentation. See #49572

4 days ago
Closed ticket #40519, in Core Trac:
Document that get_metadata() returns false for bad parameters

6 days ago
Posted a reply to One PHP Notice left after last update, on the site WordPress.org Forums:
Thanks. What environment is this on please?

1 week ago
Posted a reply to How to see non-logged in data?, on the site WordPress.org Forums:
This functionality sets a cookie in your browser which allows you to then log out…

1 week ago
Committed [2346444] to Plugins Trac:
Update to version 3.6.1 from GitHub

1 week ago
Posted a reply to Deny switch_users capability, on the site WordPress.org Forums:
I'm not familiar with the User Role Editor plugin, but in the Members plugin for…

1 week ago
Committed [48590] to Core Trac:
Docs: Another pass at some inline docs fixes mostly made by PHPCBF. ...

2 weeks ago
Committed [48586] to Core Trac:
Docs: First pass at some inline docs fixes mostly made by PHPCBF. See ...

2 weeks ago
Created a new ticket, #50744, in Core Trac:
Add the WordPress-Docs standard to the PHPCS configuration

2 weeks ago
Posted a reply to incompatibility with latest woocommerce update, on the site WordPress.org Forums:
Sorry to say this but this looks very much like your site has been hacked.…

2 weeks ago
Committed [48585] to Core Trac:
Docs: Use more appropriate variable names in the inline docs for ...

2 weeks ago
Posted a reply to incompatibility with latest woocommerce update, on the site WordPress.org Forums:
What's the error?

2 weeks ago
Committed [48576] to Core Trac:
Docs: Further corrections and improvements to various inline ...

2 weeks ago
Committed [48574] to Core Trac:
Docs: Various formatting improvements to inline docblocks. See #49572

2 weeks ago
Committed [48573] to Core Trac:
Docs: Various corrections to inline docblocks. See #49572

2 weeks ago
Posted a reply to Does this plugin work with real cron?, on the site WordPress.org Forums:
If the events are missing their schedules then they aren't running, regardless of how they're…

2 weeks ago
Created a new ticket, #50734, in Core Trac:
Document common values for hook names that contain dynamic portions

2 weeks ago
Posted a reply to Automatic static page export, on the site WordPress.org Forums:
I'm sorry but I can't help you with this. You'll need to speak with WP2static.

2 weeks ago
Posted a reply to Does this plugin work with real cron?, on the site WordPress.org Forums:
Okay so those errors are telling you that the events have missed their schedule (eg…

2 weeks ago
Posted a reply to Does this plugin work with real cron?, on the site WordPress.org Forums:
This plugin is for managing WordPress cron events. It's unrelated to real system cron events.…

2 weeks ago
Wrote a comment on the post Passing arguments to template files in WordPress 5.5, on the site Make WordPress Core:
Even in a future with full site editing, there's still plenty of need for template…

2 weeks ago
Posted a reply to Query Monitor not logging UPDATE or INSERT, on the site WordPress.org Forums:
Are you trying to view these queries on the page after a redirect has been…

3 weeks ago
Posted a reply to Issues with Woo Customer Info being transferred to other customer accounts, on the site WordPress.org Forums:
Sounds like something you should contact the WooCommerce team about. User Switching uses standard WordPress…

3 weeks ago
Posted a reply to WooCommerce Order Details, on the site WordPress.org Forums:
I'll take a look.

3 weeks ago
Posted a reply to Anyway to get sig in callback function?, on the site WordPress.org Forums:
I don't believe this is possible because the cron event runs asynchronously. In addition, the…

3 weeks ago
Posted a reply to Failed to the delete the cron event crontrol_cron_job., on the site WordPress.org Forums:
WordPress cron events aren't real cron events so cron -l won't show you anything. This…

3 weeks ago
Posted a reply to Is it possible to get a paid customization for this plugin, on the site WordPress.org Forums:
Thanks for the enquiry but I'm not available for paid work at the moment. I…

3 weeks ago
Posted a reply to Add to Cart Not Always Working, on the site WordPress.org Forums:
Are you using at least WooCommerce version 3.6? Prior to that it wasn't possible for…

3 weeks ago
Posted a reply to WP Core issue?, on the site WordPress.org Forums:
This most likely means you have a very large number of rows in the options…

3 weeks ago
Posted a reply to Cron job doesnt run and duplicate job is created, on the site WordPress.org Forums:
Are your other cron events running properly? This is a sign that your cron runner…

4 weeks ago
Posted a reply to Installed WP control but booking reminder notification in MEC doesn’t work, on the site WordPress.org Forums:
Sorry you're having a problem with your site, but this isn't anything specific to WP…

4 weeks ago
Posted a reply to Invalid (empty) cron events, on the site WordPress.org Forums:
Thanks for the update. I think this sort of broken list of cron events is…

4 weeks ago
Posted a reply to Invalid (empty) cron events, on the site WordPress.org Forums:
If you're happy to send me a copy of the contents of your cron option…

1 month ago
Posted a reply to Invalid (empty) cron events, on the site WordPress.org Forums:
I've not seen these personally. Does this mean that in the database you have an…

1 month ago
Posted a reply to Query Monitor not showing on frontend, on the site WordPress.org Forums:
Potentially yes. The best approach is to export your production database to staging and test…

1 month ago
Posted a reply to Query Monitor not showing on frontend, on the site WordPress.org Forums:
Sorry to hear that. Did you try the suggestions in that other thread? I know…

1 month ago
Posted a reply to PHP Errors in Ajax Response, on the site WordPress.org Forums:
This is the placeholder JavaScript that QM uses to display information about errors in Ajax,…

1 month 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…

1 month 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…

1 month 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…

1 month 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…

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

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

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

2 months 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 months 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 months 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 months ago