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
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 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 Setup time schedules on API connection for importing post feeds, on the site WordPress.org Forums:
If you have a server-level cron job running which does the import then you don't…

26 mins ago
Posted a reply to User roles not working when switched, on the site WordPress.org Forums:
Sorry but you'll need to ask the author of the Wholesale plugin to take a…

3 hours ago
Closed ticket #53595, in Core Trac:
Correct the description for the `last_updated` property in the ...

19 hours ago
Committed [51676] to Core Trac:
REST API: Correct the description for the `last_updated` property in ...

19 hours ago
Closed ticket #53597, in Core Trac:
Correct the documentation for the `wp_kses_allowed_html` filter

20 hours ago
Committed [51675] to Core Trac:
Security: Correct the inline docs for the `wp_kses_allowed_html` ...

20 hours ago
Posted a reply to disable plugin, on the site WordPress.org Forums:
Please contact the authors of the plugins or themes that are causing the errors.

5 days ago
Posted a reply to Switching does not work with Simple Membership plugin, on the site WordPress.org Forums:
There's nothing in User Switching which would cause it to behave differently between different browsers.…

1 week ago
Posted a reply to Mapped Domains in multi-site w/ user switching, on the site WordPress.org Forums:
Thanks for the report. I've tested this out on a few sites with domain mapping…

2 weeks ago
Posted a reply to Unable to add cron event with custom cron schedule, on the site WordPress.org Forums:
I've done some testing but I can't reproduce this problem. I tried both with and…

2 weeks ago
Posted a reply to Lots of Slow Queries, on the site WordPress.org Forums:
Sorry but I can't help with issues that Query Monitor identifies on your site, it…

2 weeks ago
Closed ticket #35569, in Core Trac:
Avatar should update when email is changed

2 weeks ago
Closed ticket #53923, in Core Trac:
Redesign profile settings using tabbed interface

2 weeks ago
Posted a reply to Can we please turn off the reminder?, on the site WordPress.org Forums:
This is not coming from User Switching. It must be coming from another plugin or…

2 weeks ago
Posted a reply to Cron for Syncing Calendars for Rental Units, on the site WordPress.org Forums:
I'm sorry but it's not clear from those instructions. It looks like you need to…

2 weeks ago
Posted a reply to Unable to add cron event with custom cron schedule, on the site WordPress.org Forums:
Thanks for the report. * What happens when you try to save the event? Do…

2 weeks ago
Posted a reply to Non-blocking (anything important), on the site WordPress.org Forums:
Oh and to answer your question, no WP Crontrol doesn't change the way the cron…

3 weeks ago
Posted a reply to Non-blocking (anything important), on the site WordPress.org Forums:
This isn't anything to be worried about, this is how WordPress triggers the cron events…

3 weeks ago
Committed [51578] to Core Trac:
Themes: Correct the documented types for theme mod values. A theme ...

3 weeks ago
Posted a reply to Strange insert query, on the site WordPress.org Forums:
This is standard WordPress functionality. An auto-draft gets inserted when you access the New Post…

3 weeks ago
Posted a reply to Excess Cron’s, on the site WordPress.org Forums:
Sorry then I don't know what the problem is. If the cron event can't be…

3 weeks ago
Posted a reply to Excess Cron’s, on the site WordPress.org Forums:
I meant deactivate the booking plugin you're using. If it leaves cron events behind then…

3 weeks ago
Posted a reply to Excess Cron’s, on the site WordPress.org Forums:
It sounds like the plugin might be re-adding the event after it's deleted. You might…

3 weeks ago
Posted a reply to Cron not work, on the site WordPress.org Forums:
Sorry this isn't something I can help you with here. Please see https://wordpress.org/support/topic/please-read-before-posting-a-support-thread-2/.

4 weeks ago
Committed [2576771] to Plugins Trac:
Updating readme/assets from GitHub

4 weeks ago
Committed [2576758] to Plugins Trac:
Updating readme/assets from GitHub

4 weeks ago
Created a new ticket, #53861, in Core Trac:
Promote a database error during test bootstrap to a failure

4 weeks ago
Reopened ticket #53845, in Core Trac:
Add some more MySQL information to the Debug section in Site Health

4 weeks ago
Posted a reply to PHP Errors/Notices, on the site WordPress.org Forums:
You'll be better off asking on the Astra forum or the general theme forum, as…

4 weeks ago
Posted a reply to 2 HTTP API Calls, on the site WordPress.org Forums:
You'll need to contact either BoldGrid or your web host about this problem. Sounds like…

4 weeks ago
Closed ticket #53594, in Core Trac:
Standardise punctuation in site health test messages

4 weeks ago
Posted a reply to Change Destination to Where We Started From, on the site WordPress.org Forums:
Yes, this is possible. Take a look at this FAQ for info about the actions…

4 weeks ago
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…

1 month 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.

1 month 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…

1 month 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…

1 month 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…

2 months 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…

2 months 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…

2 months 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/

2 months 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…

2 months 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…

2 months 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,…

2 months 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…

2 months 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…

2 months 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…

2 months 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.…

2 months 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…

2 months 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…

2 months 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…

3 months ago