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

Committed [51851] to Core Trac:
Docs: Miscellaneous docblock corrections and improvements. See ...

17 hours ago
Committed [51850] to Core Trac:
General: Fix code quality issues which were identified by static ...

18 hours ago
Posted a reply to User Switching between a Parent/Child Account, on the site WordPress.org Forums:
Yes if you grant the ability for the parent to edit the child account then…

20 hours ago
Closed ticket #11831, in Core Trac:
Warning when wp-cron fails

2 days ago
Closed ticket #9785, in Core Trac:
Search Enhancements -- consolidated ticket

2 days ago
Closed ticket #7845, in Core Trac:
suggested wp-mail.php improvements

2 days ago
Closed ticket #9232, in Core Trac:
introduce include_tree parameter to wp_list_pages

2 days ago
Closed ticket #9175, in Core Trac:
Admin Option Page lacks Infos about serialized Option Values

2 days ago
Closed ticket #8368, in Core Trac:
Scheduling post time behavior and language refinements

2 days ago
Closed ticket #7756, in Core Trac:
AJAX saving method instead of reloading the page

2 days ago
Closed ticket #7740, in Core Trac:
Merge Tags

2 days ago
Posted a reply to Alternate customer user role not switchable, on the site WordPress.org Forums:
If the role has the edit_users and list_users capabilities then that should be enough for…

1 week ago
Posted a reply to User Switching just stopped working on Chrome, on the site WordPress.org Forums:
I did some cursory Googling and there doesn't appear to be any cookie related changes…

1 week ago
Posted a reply to User Switching just stopped working on Chrome, on the site WordPress.org Forums:
Also are you using any extensions in Chrome or security settings that your sales agents…

1 week ago
Posted a reply to User Switching just stopped working on Chrome, on the site WordPress.org Forums:
Which version of Chrome are you using please? Is there anything unusual about the domain…

1 week ago
Posted a reply to Query Monitor conflicts with WP Rocket, on the site WordPress.org Forums:
Are there any JavaScript errors in your browser console? You might be better off asking…

2 weeks ago
Posted a reply to Dealing w/ Terms & Conditions Acceptance with User Switching, on the site WordPress.org Forums:
Sorry but this is outside of the scope of User Switching and the support I…

2 weeks ago
Posted a reply to Change the URL of switch to destiny, on the site WordPress.org Forums:
I don't really understand what you're trying to do but I suspect what you want…

2 weeks ago
Posted a reply to User Switching – Employee Manager, on the site WordPress.org Forums:
I'm sorry but this is well outside of what I can support you with. If…

2 weeks ago
Posted a reply to Logging Slow Queries, on the site WordPress.org Forums:
The short answer is this isn't possible. Various logging is however something I've been working…

2 weeks ago
Posted a reply to Help showing QM Output to Authors, on the site WordPress.org Forums:
Hmm I'm not sure what the problem might be. Does it work if you set…

2 weeks ago
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…

4 weeks 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…

4 weeks 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.

1 month 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 month 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…

1 month 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…

1 month 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…

1 month 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…

1 month 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…

1 month 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…

1 month 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…

1 month 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…

1 month 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…

2 months 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…

2 months 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…

2 months 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…

2 months 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/.

2 months ago
Committed [2576771] to Plugins Trac:
Updating readme/assets from GitHub

2 months ago
Committed [2576758] to Plugins Trac:
Updating readme/assets from GitHub

2 months 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…

2 months 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…

2 months 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…

2 months 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…

2 months 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.

2 months 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 months 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 months 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…

3 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…

3 months ago