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 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 days 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…

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

4 days 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…

5 days 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…

6 days 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…

6 days 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…

6 days 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/.

1 week ago
Committed [2576771] to Plugins Trac:
Updating readme/assets from GitHub

1 week ago
Committed [2576758] to Plugins Trac:
Updating readme/assets from GitHub

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

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

1 week 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…

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

2 weeks ago
Committed [51519] to Core Trac:
Site Health: Standardise site health check status message punctuation. ...

2 weeks ago
Closed ticket #53457, in Core Trac:
Rename `$this` when used in `@param` tags for 5.9

2 weeks ago
Committed [51518] to Core Trac:
Docs: Replace `$this` in hook param docs with more appropriate names. ...

2 weeks ago
Closed ticket #38237, in Core Trac:
Increase the slow test threshold for tests that perform external HTTP ...

2 weeks ago
Committed [51514] to Core Trac:
Docs: Add missing documentation for the `minute` parameter of ...

2 weeks ago
Committed [51513] to Core Trac:
Docs: Correct the documented allowed range for the `minute` and ...

2 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…

2 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…

3 weeks 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.

3 weeks 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…

4 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…

4 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…

1 month 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…

1 month 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…

1 month 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/

1 month 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…

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