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

Activity
Plugins
Favorites
Translations

Created a new ticket, #49887, in Core Trac:
No user feedback when trying to bulk delete an active plugin

4 hours ago
Posted a reply to plugin left tool is appearing behind the admin left menu, on the site WordPress.org Forums:
It looks like you're using a custom theme for your admin area. The plugin you're…

16 hours ago
Posted a reply to Still Maintained?, on the site WordPress.org Forums:
Yep, I've been working on some changes but haven't had a need to release an…

2 days ago
Posted a reply to Can’t choose parent page with Query Monitor enabled, on the site WordPress.org Forums:
What's the fatal error that shows up in your PHP error log when this happens?…

2 days ago
Posted a reply to query-monitor.js should NOT be added to oEmbed iframes, on the site WordPress.org Forums:
QM has a fallback mode for basic functionality when its JS fails to load, but…

4 days ago
Posted a reply to query-monitor.js should NOT be added to oEmbed iframes, on the site WordPress.org Forums:
Thanks, I'll take a look.

4 days ago
Wrote a comment on the post Proposal: GitHub Theme Review, on the site Theme Review Team:
Joy, please do not be so dismissive of the detailed explanatory information that a theme…

5 days ago
Posted a reply to Add new cron jobs, on the site WordPress.org Forums:
You'll need to ask in the WooCommerce forums.

1 week ago
Posted a reply to Only working unless I regenerate password user., on the site WordPress.org Forums:
Why are you logging in manually? This plugin removes the need for you to do…

1 week ago
Created a new ticket, #49784, in Core Trac:
Synchronise .gitignore and svn:ignore

1 week ago
Created a new ticket, #49783, in Core Trac:
PHPCS config: Persistent caching on Travis

1 week ago
Created a new ticket, #49781, in Core Trac:
PHPCS config: exclude plugins and themes within src

1 week ago
Closed ticket #40267, in Core Trac:
Remove mode switcher from the network admin users screen

2 weeks ago
Closed ticket #40268, in Core Trac:
Remove mode switcher from the network admin sites screen

2 weeks ago
Closed ticket #18162, in Core Trac:
Bulk action: Add multiple users to a site

2 weeks ago
Reopened ticket #38665, in Core Trac:
Add user language preference to 'Add new user' form

2 weeks ago
Closed ticket #49740, in Core Trac:
Hooking to page_attributes_dropdown_pages_args filter adds a dropdown ...

2 weeks ago
Created a new ticket, #49723, in Core Trac:
Login failure shake should respect the prefers-reduced-motion media query

2 weeks ago
Wrote a comment on the post wp-env: Simple Local Environments for WordPress., on the site Make WordPress Core:
@noahtallen How does wp-env differ from the local environment that's bundled with the develop version…

2 weeks ago
Posted a reply to Custom PHP Cron keeps deleting itself?, on the site WordPress.org Forums:
I've seen issues in the past with cron events with recurrences that are shorter than…

2 weeks ago
Posted a reply to Query Monitor: Not able to install the plugin due to Missing archive file, on the site WordPress.org Forums:
This seems to be a problem with the filesystem on your site. I would contact…

3 weeks ago
Posted a reply to Restricting roles a user can switch to, on the site WordPress.org Forums:
This is a tricky thing to achieve because there's an assumption that a user needs…

3 weeks ago
Posted a reply to External object cache not in use, on the site WordPress.org Forums:
The developer console is a tool in your web browser. If you've not used this…

3 weeks ago
Posted a reply to External object cache not in use, on the site WordPress.org Forums:
Did you check the developer console for the errors?

3 weeks ago
Posted a reply to Missing Style error, on the site WordPress.org Forums:
Sorry but I'm unable to help you fix issues that QM informs you about. I…

3 weeks ago
Posted a reply to site error, on the site WordPress.org Forums:
I've no idea what could cause this error to be hidden when QM is active…

3 weeks ago
Posted a reply to site error, on the site WordPress.org Forums:
Does the error show up in the Query Monitor menu when it's active?

4 weeks ago
Posted a reply to External object cache not in use, on the site WordPress.org Forums:
Actually that link might not provide the info you need. Your server is set up…

4 weeks ago
Posted a reply to External object cache not in use, on the site WordPress.org Forums:
https://wordpress.org/support/topic/external-object-cache-not-in-use-2/

4 weeks ago
Posted a reply to What is this cron?, on the site WordPress.org Forums:
No, sorry. You should try the main support forums.

4 weeks ago
Posted a reply to Checking queries for POST http method (wp-admin/post.php), on the site WordPress.org Forums:
Unfortunately this isn't currently possible. The results you're seeing are fromthe subsequent GET request after…

1 month ago
Posted a reply to Allow Switching for other Roles, on the site WordPress.org Forums:
Yep. Check out the FAQ.

1 month ago
Wrote a comment on the post All-women Release Squad, on the site Make WordPress Core:
Great initiative. I think you've got this, but if you do need assistance I'm happy…

1 month ago
Posted a reply to Help With Missing Dependencies, on the site WordPress.org Forums:
I recommend contacting the author of the whatsapp-for-wordpress plugin as it sounds like there's a…

1 month ago
Posted a reply to ERR_INCOMPLETE_CHUNKED_ENCODING, on the site WordPress.org Forums:
This means there is a problem with your network, your proxy, your web browser, your…

1 month ago
Posted a reply to How to use this Plug-in Effectively, on the site WordPress.org Forums:
Does your website perform well under heavy read-only load? For example, with a high number…

1 month ago
Posted a reply to Getting fatal error when trying to switch, on the site WordPress.org Forums:
You'll need to get in touch with WooCommerce or Woocom Wholesale System.

1 month ago
Posted a reply to Wonderful too, but failing on DEV/TEST/LIVE Pantheon environment, on the site WordPress.org Forums:
@jcastaneda Hey Jose, thanks for jumping in. What does this bizarre paragraph on the "WordPress…

1 month ago
Wrote a new post, Summary for Docs Team Meeting: March 2, 2020, on the site Make WordPress Documentation:
Attendance Milana CapJon AngYui ゆいDenis ŽoljomPrashant BaldhaChris Van PattentheMikeDJb AudrasAkira TachibanaEstela RuedaBirgit Pauli-HaackJono AldersonJohn Blackbourn…

1 month ago
Posted a reply to Can this plugin be expanded to allow viewing variables?, on the site WordPress.org Forums:
Yeah there's a third party add-on plugin that allows for this: https://wordpress.org/plugins/query-monitor-extension-checking-variables/ Coincidentally I'm asking…

1 month ago
Posted a reply to Not switching at all, on the site WordPress.org Forums:
Ah yes this plugin has been mentioned in years gone past. The issue is that…

2 months ago
Posted a reply to Not switching at all, on the site WordPress.org Forums:
This may happen if you have particularly aggressive caching in place on your site, or…

2 months ago
Posted a reply to External object cache not in use, on the site WordPress.org Forums:
This means that you don't have an object cache in use. You may wish to…

2 months ago
Posted a reply to No further cron jobs in one of my sites, on the site WordPress.org Forums:
This means there's a problem on your site that is preventing your WP-Cron events from…

2 months ago
Posted a reply to Externe object-cache niet in gebruik The APCu extension for PHP is installed bu, on the site WordPress.org Forums:
Correct, it checks for several extensions: https://github.com/johnbillion/query-monitor/blob/develop/collectors/cache.php#L80-L83

2 months ago
Posted a reply to cron-job stopped working: error 404, on the site WordPress.org Forums:
It sounds like wp-cron.php got deleted. You'll need to reinstall WordPress. This isn't anything to…

2 months ago
Posted a reply to Externe object-cache niet in gebruik The APCu extension for PHP is installed bu, on the site WordPress.org Forums:
In order for your WordPress site to use APCu for its object cache, you need…

2 months ago
Posted a reply to hooks names with no associated actions, on the site WordPress.org Forums:
Yeah the majority of the time these are events left over by old plugins. The…

2 months ago
Posted a reply to WP-Cron spawning is disabled, on the site WordPress.org Forums:
You'll need to contact your host about this.

2 months ago
Posted a reply to Custom Cron Schedule Stops Running, on the site WordPress.org Forums:
Sorry you're having a problem! WP Crontrol doesn't handle running cron events, so your best…

2 months ago