John Blackbourn – @johnbillion

Member Since: December 7th, 2005
Location: Tonbridge, UK; and Torino, Italy
Website: johnblackbourn.com
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.

Find me on GitHub and Bleeter.

Contribution History

Accessibility Contributor
Accessibility 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 Speaker
WordCamp Speaker
Plugin Developer
Plugin Developer

Activity
Plugins
Favorites

Committed [46624] to Core Trac:
Docs: Correct some more invalid inline docs. See ...

3 hours ago
Committed [46623] to Core Trac:
Docs: Correct some incorrect docblock tags. See #48303

6 hours ago
Created a new ticket, #48449, in Core Trac:
Parameters differ between instances of widget_comments_args filter

3 days ago
Committed [46610] to Core Trac:
Docs: Miscellaneous docblock corrections. See #48303

3 days ago
Committed [46609] to Core Trac:
Docs: Coding standards fix after [46608]. See #48303

3 days ago
Committed [46608] to Core Trac:
Docs: Remove some funky nested filters. See #48303

3 days ago
Created a new ticket, #48443, in Core Trac:
Pass the user object to the post_locked_dialog action

4 days ago
Committed [46604] to Core Trac:
Docs: Correct invalid hook docblock placement. See #48303

4 days ago
Committed [46603] to Core Trac:
Docs: Correct invalid hook docblocks. See #48303

4 days ago
Created a new ticket, #48441, in Core Trac:
Parameters differ between instances of tiny_mce_plugins filter

4 days ago
Posted a reply to WP Cron failed to complete, on the site WordPress.org Forums:
That page URL isn't from this plugin. Sorry!

1 week ago
Posted a reply to WP Cron failed to complete, on the site WordPress.org Forums:
It doesn't show success and failure. Are you sure you have the correct plugin?

1 week ago
Posted a reply to WP Cron failed to complete, on the site WordPress.org Forums:
Sorry that you're having a problem with your cron events. This doesn't sound like it's…

1 week ago
Created a new ticket, #4783, in Meta Trac:
Invalid hooks listed in Code Reference

1 week ago
Posted a reply to Missing Dependencies wp-auth-check + autosave, on the site WordPress.org Forums:
Unfortunately I'm unable to help debug individual issues that QM surfaces. It would be a…

3 weeks ago
Posted a reply to Crontab doesn’t work, on the site WordPress.org Forums:
Sorry you're having problems. This is how the cron system in WordPress works, it's not…

3 weeks ago
Committed [2170263] to Plugins Trac:
Tagging 3.4.0

3 weeks ago
Committed [2170262] to Plugins Trac:
Committing 3.4.0 to trunk

3 weeks ago
Posted a reply to Compatbility with WooCommerce Wholesale Prices Premium Plugin, on the site WordPress.org Forums:
I'm unable to support paid plugins. Your best bet is to get in contact with…

4 weeks ago
Posted a reply to Cart content is copied when switching users, on the site WordPress.org Forums:
Are you using WooCommerce 3.6 or later? This is an issue with earlier versions of…

4 weeks ago
Posted a reply to See Admin Features in User View, on the site WordPress.org Forums:
Nope, not unless you create a user role that has just the capabilities that allow…

1 month ago
Posted a reply to Monitor the Ajax request, on the site WordPress.org Forums:
The short answer is no, there's not currently a way to do this but it's…

1 month ago
Posted a reply to QM finish vs page finish, on the site WordPress.org Forums:
The short answer is yes, and this may mean there's probably a network connectivity issue…

1 month ago
Posted a reply to How to Switch Back from WooCommerce Customer account?, on the site WordPress.org Forums:
In addition to the admin toolbar there's a Switch Back button in a few places:…

1 month ago
Wrote a comment on the post New Block APIs in WordPress 5.3, on the site Make WordPress Core:
`register_block_style()` is neat. When the style_handle argument is passed, does the style get automatically enqueued…

1 month ago
Posted a reply to Slow Queries on wp_options, on the site WordPress.org Forums:
This is something you'll need to speak with your web host about. A transient update…

1 month ago
Posted a reply to Cron action callback not executing, on the site WordPress.org Forums:
I've seen this a few times but I've never been able to track down the…

1 month ago
Posted a reply to PHP Warning: Use of undefined constant DB_USER, on the site WordPress.org Forums:
This sounds like something's gone wrong with your site configuration. DB_USER is a standard constant…

1 month ago
Posted a reply to Argument 1 passed to QueryMonitor::filter_plugin_action_links() must be array, on the site WordPress.org Forums:
Thanks for the report. This sounds like another plugin on your site is incorrectly filtering…

2 months ago
Posted a reply to Unable to View Query Monitor on Frontend, on the site WordPress.org Forums:
If you view the source code of the page, can you see any of QM's…

2 months ago
Posted a reply to cache issue, on the site WordPress.org Forums:
Sorry you're having problems. You're probably better off asking the author of the caching plugin.…

2 months ago
Posted a reply to User Switching fails after second time Switching to a user, on the site WordPress.org Forums:
User Switching does support nested switching (in case you were wondering), so this should work…

2 months ago
Posted a reply to The link you followed has expired, on the site WordPress.org Forums:
Can you clear all your cookies and try again?

2 months ago
Posted a reply to Required to login when switching, on the site WordPress.org Forums:
Can you clear all your cookies and try again? If that doesn't work, what exactly…

2 months ago
Posted a reply to PHP Fatal Error – Multiple Cron Events, on the site WordPress.org Forums:
I'd you can't edit this event then something has gone very wrong with the storage…

2 months ago
Posted a reply to PHP Fatal Error – Multiple Cron Events, on the site WordPress.org Forums:
This error means you have a fatal error occurring in the PHP code in your…

2 months ago
Posted a reply to View query attachments with query monitor?, on the site WordPress.org Forums:
QM doesn't currently expose all the same debugging information for Ajax calls as for regular…

2 months ago
Posted a reply to Include User Switching Link Outside users.php, on the site WordPress.org Forums:
Yeah you can do this with the following code: $link = user_switching::maybe_switch_url( $user ) where…

2 months ago
Posted a reply to Deny Switching cap for roles, on the site WordPress.org Forums:
Link to the tests for this: https://github.com/johnbillion/user-switching/blob/e800a11f42ab94e2692b9d937b244aef37dd2e26/tests/test-caps.php#L112-L156

2 months ago
Posted a reply to Deny Switching cap for roles, on the site WordPress.org Forums:
Yep you need to set the $grant parameter to false for the capability. Removing the…

2 months ago
Posted a reply to Error in WordPress, on the site WordPress.org Forums:
Responded here: https://github.com/johnbillion/query-monitor/issues/464

2 months ago
Posted a reply to Monitor queries after Ajax, on the site WordPress.org Forums:
Unfortunately you can't see the whole list of queries (this is something I'm working on,…

2 months ago
Posted a reply to How to Limit Target User Account Access?, on the site WordPress.org Forums:
Thanks for the message. This is possible but you'll need to get a developer to…

2 months ago
Posted a reply to “Queries by component” removed?, on the site WordPress.org Forums:
Thanks for the message. This feature is still there but I did remove it from…

2 months ago
Posted a reply to run my job only in range of hours, on the site WordPress.org Forums:
Nope, this isn't something that WordPress core natively supports. You'd need to schedule an event…

2 months ago
Posted a reply to Disable forget_woocommerce_session(), on the site WordPress.org Forums:
Hmm, can you try changing init in the sample code above to plugins_loaded?

2 months ago
Posted a reply to Clickable error messages for fatal errors, on the site WordPress.org Forums:
With the Throwable interface in PHP7+ it's possible to catch a fatal error and then…

3 months ago
Posted a reply to 502 error on user switching – Apache Web Server, on the site WordPress.org Forums:
You'll need to ask you web host about the cause of the error.

3 months ago
Posted a reply to Disable forget_woocommerce_session(), on the site WordPress.org Forums:
I've moved this functionality into actions in User Switching 1.5.2 so it can be unhooked:…

3 months ago
Committed [2140831] to Plugins Trac:
Tagging 1.5.2

3 months ago