John Blackbourn (@johnbillion) – WordPress user profile

Member Since: December 7th, 2005
Location: Tonbridge, UK; and Torino, Italy
Website: johnblackbourn.com
GitHub: johnbillion
Employer: Human Made Ltd
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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 a Principal Web Engineer at Human Made.

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

Contributions Sponsored

John Blackbourn contributes 4 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

Posted a reply to Unable to find Query Monitor on frontend, on the site WordPress.org Forums:
Does the WordPress admin toolbar appear on the front end? If not then you won't…

5 days ago
Created a new ticket, #53746, in Core Trac:
Tidy up the tearDown() methods

6 days ago
Committed [51477] to Core Trac:
Docs: Miscellaneous docblock corrections and improvements. See #53399

6 days ago
Posted a reply to Getting 404 when clicking on “Switch to”, on the site WordPress.org Forums:
That's good to hear, thanks for letting me know.

7 days ago
Closed ticket #53718, in Core Trac:
editor-styles missing from $_old_files

1 week ago
Closed ticket #53687, in Core Trac:
`grunt verify:old-files` incorrectly flagging certain files

1 week ago
Committed [51463] to Core Trac:
Application Passwords: Improve various user-facing and ...

1 week ago
Created a new ticket, #53692, in Core Trac:
Inaccurate schema for the app_id property in the application-passwords ...

1 week ago
Created a new ticket, #53691, in Core Trac:
Terminology improvements for application passwords

1 week ago
Posted a reply to PHP Errors/Notices, on the site WordPress.org Forums:
Thanks. Do you know which plugin or theme is causing the PHP error that causes…

2 weeks ago
Posted a reply to No Queries by component, on the site WordPress.org Forums:
Yes that's correct. Did you click the "more information" link after the message? All the…

2 weeks ago
Created a new ticket, #53658, in Core Trac:
Display a user-facing message when the application passwords ...

2 weeks ago
Posted a reply to No switch_users capability picked up, on the site WordPress.org Forums:
It's a meta capability so it won't show up in these sorts of lists. There…

3 weeks ago
Created a new ticket, #53621, in Core Trac:
The `wp/v2/block-directory/search` schema is incorrect

3 weeks ago
Posted a reply to all my cron have alerte icon, on the site WordPress.org Forums:
This means DISABLE_WP_CRON must be set to true somewhere else, and your false definition in…

3 weeks ago
Posted a reply to Unable to disable Query Monitor, on the site WordPress.org Forums:
This means you've got errors on your site that you'll need to fix. You should…

4 weeks ago
Posted a reply to Conflict with All In One WP Security, on the site WordPress.org Forums:
Please see https://wordpress.org/support/topic/conflict-with-all-in-one-wp-security-firewall/

4 weeks ago
Posted a reply to Getting 404 when clicking on “Switch to”, on the site WordPress.org Forums:
Is the 404 shown for the wp-login.php page or for the page you get redirected…

1 month ago
Posted a reply to How to interpret the pagesize, on the site WordPress.org Forums:
By the way, this is peak memory usage not page size. More info the Overview…

1 month ago
Posted a reply to How to interpret the pagesize, on the site WordPress.org Forums:
There's no decimal precision for this value so it's a thousands separator in this case,…

1 month ago
Posted a reply to cron can not be deleted, on the site WordPress.org Forums:
If you take a look through the FAQs there's a couple of answers about cron…

1 month ago
Posted a reply to How query monitor identifies queries made by plugins?, on the site WordPress.org Forums:
It's the patented, top-secret, generations-old recipe from my great-grandmother inside Query Monitor which is used…

1 month ago
Posted a reply to Switch Off, on the site WordPress.org Forums:
There isn't a specific URL because it differs for each user, but you can use…

1 month ago
Posted a reply to No php Event Type option, on the site WordPress.org Forums:
Take a look through the FAQ, I've answered a couple of questions about this there.…

1 month ago
Posted a reply to Run Automatically Without a server request to run Cron on the WordPress, on the site WordPress.org Forums:
Nope, sorry, WP Crontrol doesn't change how your cron events are run. This page might…

1 month ago
Posted a reply to Authentication cookie not working on Home page and Shop page, on the site WordPress.org Forums:
Do you have caching in place on your site? Are there PHP errors in your…

1 month ago
Posted a reply to Query monitor, on the site WordPress.org Forums:
Query Monitor is just a regular plugin, if you delete it but it's still showing…

2 months ago
Posted a reply to ADDING PHP CODE WPAMELIA AND WPCONTROL, on the site WordPress.org Forums:
This means the permissions on your site doesn't allow PHP code to be added. Please…

2 months ago
Posted a reply to Caching issues when switching back, on the site WordPress.org Forums:
I would say it's best to get in touch with the author of the shortcode…

2 months ago
Committed [2544434] to Plugins Trac:
Updating readme/assets from GitHub

2 months ago
Posted a reply to What does the warning icon on next run mean?, on the site WordPress.org Forums:
This means the event has missed its schedule. Do you also see a warning message…

2 months ago
Posted a reply to Unable to create users, on the site WordPress.org Forums:
Was it a jQuery issue?

2 months ago
Posted a reply to Unable to create users, on the site WordPress.org Forums:
Can you report this to the authors of the mainwp plugin please? Query Monitor doesn't…

2 months ago
Posted a reply to Unable to create users, on the site WordPress.org Forums:
Is there a JavaScript error in your browser developer tools console?

2 months ago
Posted a reply to Duplicate & Slow Queries, on the site WordPress.org Forums:
If those slow queries are always slow on every page load, then that suggests your…

2 months ago
Posted a reply to Missing Dependencies upon heartbeat deactivatton, on the site WordPress.org Forums:
It sounds like WP Rocket is deregistering the script, which means other scripts that depend…

2 months ago
Posted a reply to PHP Warning Non Numeric Value, on the site WordPress.org Forums:
You're right it does return a string, but for that particular directive it should return…

2 months ago
Posted a reply to PHP Warning Non Numeric Value, on the site WordPress.org Forums:
Documentation link for reference: https://www.php.net/manual/en/info.configuration.php#ini.max-execution-time

2 months ago
Posted a reply to PHP Warning Non Numeric Value, on the site WordPress.org Forums:
Thanks for the report. "300s" is not a valid value for the max_execution_time directive as…

2 months ago
Posted a reply to Line 140 Issue, on the site WordPress.org Forums:
Thanks, this has been reported a few times but so far I've been unable to…

2 months ago
Posted a reply to Is it supposed to run crons if DISABLE_WP_CORON is true ?, on the site WordPress.org Forums:
This plugin doesn't bypass anything but it does directly call spawn_cron() if you manually run…

2 months ago
Posted a reply to Can’t load a page when QM is activated, on the site WordPress.org Forums:
It could be that PHP is running out of memory when QM tries to log…

2 months ago
Posted a reply to current user id, on the site WordPress.org Forums:
Sorry but I'm unable to assist with writing cron events, it would be a full…

2 months ago
Posted a reply to Change the location of the switch back link, on the site WordPress.org Forums:
Yep, the Switch Back link has a user_switching_switch_on ID that you can use in your…

2 months ago
Posted a reply to make shortcode with user_id variable, on the site WordPress.org Forums:
The short answer is no, sorry, this isn't something that I'll be adding. I know…

2 months ago
Posted a reply to Email addresses are automatically inserted in the user meta, on the site WordPress.org Forums:
Please try deactivating your other plugins one by one too. It's unlikely that QM is…

2 months ago
Posted a reply to add switch link as meta data, on the site WordPress.org Forums:
This is PHP code. You need to put it inside the relevant PHP template for…

2 months ago
Posted a reply to Ajax warning, on the site WordPress.org Forums:
If you click the menu item you'll see instructions for viewing the errors in the…

2 months ago
Posted a reply to Buddypress, on the site WordPress.org Forums:
To be honest I haven't used BuddyPress for many years. Can you test this using…

2 months ago
Posted a reply to Woocommcerce know who placed order, on the site WordPress.org Forums:
Yes this should be possible but you will need to write some code to store…

2 months ago