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 Conflict with Woocommerce, on the site WordPress.org Forums:
Is there a JavaScript error in your browser console?

7 hours ago
Posted a reply to monitor or block access to WP settings=>general, on the site WordPress.org Forums:
That's not something that you can do with this plugin unfortunately, unless the query happens…

22 hours ago
Committed [51886] to Core Trac:
Docs: Improve various inline documentation for admin bar functions and ...

2 days ago
Committed [51885] to Core Trac:
Docs: Miscellaneous inline documentation improvements, including: * ...

2 days ago
Posted a reply to Fatal error: Call to undefined function login_header(), on the site WordPress.org Forums:
The fatal has been fixed in version 1.5.8. I think the workflow you're using will…

4 days ago
Committed [2608299] to Plugins Trac:
Update to version 1.5.8 from GitHub

4 days ago
Posted a reply to Fatal error: Call to undefined function login_header(), on the site WordPress.org Forums:
It looks like somehow this workflow caused the interim-login parameter to be passed to a…

4 days ago
Posted a reply to Not working after user alias changed, on the site WordPress.org Forums:
Thanks. I can't see any reason why the nickname/alias would affect switching users, and I…

4 days ago
Posted a reply to Cron Job not working on AWS, on the site WordPress.org Forums:
It will be better to post this in the main WordPress support forum as this…

5 days ago
Posted a reply to Not working after user alias changed, on the site WordPress.org Forums:
Can you clarify what you mean by a user alias? This isn't a standard field…

6 days ago
Posted a reply to Query Monitor Queries tab says: No database queries were logged., on the site WordPress.org Forums:
Thanks for letting me know

7 days ago
Posted a reply to ?doing_wp_cron URL parameter, on the site WordPress.org Forums:
If you remove ALTERNATE_WP_CRON and visit the Tools -> Cron Events screen does WP Crontrol…

1 week ago
Posted a reply to ?doing_wp_cron URL parameter, on the site WordPress.org Forums:
If I'm honest I'm not sure where this is documented. Are you using the ALTERNATE_WP_CRON…

1 week ago
Posted a reply to ?doing_wp_cron URL parameter, on the site WordPress.org Forums:
This is part of the WordPress native WP-Cron system, it's not specific to the WP…

1 week ago
Posted a reply to Trying to access array offset on value of type int, on the site WordPress.org Forums:
Let's combine this with your other thread: https://wordpress.org/support/topic/trying-to-get-property-url-of-non-object/

1 week ago
Posted a reply to Trying to get property ‘url’ of non-object, on the site WordPress.org Forums:
Can you try to isolate the cause of the problem please? * Does the error…

1 week ago
Posted a reply to Query Monitor Queries tab says: No database queries were logged., on the site WordPress.org Forums:
This is strange, I've not had any reports of this before. * Is there a…

1 week ago
Posted a reply to User Switching plugin not working, displays login form, on the site WordPress.org Forums:
Can you try deactivating all your other plugins one by one to see if one…

1 week ago
Posted a reply to User Switching between a Parent/Child Account, on the site WordPress.org Forums:
Thanks for the info but I don't have any capacity to do work outside my…

1 week ago
Posted a reply to Switch Off, on the site WordPress.org Forums:
This PHP returns the URL needed to switch off. Where you use it depends entirely…

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

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

2 weeks 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…

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

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

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

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

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

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

2 weeks 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…

3 weeks 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…

3 weeks 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…

3 weeks 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…

3 weeks 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…

4 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…

4 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…

4 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…

4 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…

4 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…

4 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…

1 month 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…

1 month 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.…

2 months 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 months 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 months 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 months 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 months 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 months 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 months 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…

2 months ago