PHP Warnings (maybe) triggered by ActivityPub plugin

[rghedin]

Quick summary

I've been trying to track down what plugin is causing a surge in “PHP Warning” erros in my WP instance, hosted at WordPress.com.

I set up a staging site and deactivated one plugin at a time, checking out how they affect my logs. After deactivating ActivityPub plugin, the error messages disappeared.

They look like this:

Transcription:

Message: PHP Warning: foreach() argument must be of type array|object, null given in /wordpress/core/6.7/wp-admin/includes/plugin.php on line 1853
Timestamp: 2024-11-20T20:52:05.000Z
Type: core
Name: 6.7
File: /wordpress/core/6.7/wp-admin/includes/plugin.php
Line: 1853

I'm really not sure if they are caused by AP plugin; it's just my main suspicion. I also suspect it may be something related to the WordPress.com interventions with MU plugin and Jetpack, which causes some headaches from time to time.

I hope this report helps anyway.

Steps to reproduce

1. Activate AP plugin.
2. Wait.
3. Check “Logs” (not sure if it's available in self-manage WP or only in Business WP.com accounts).

What you expected to happen

No errors appearing.

What actually happened

PHP Warnings appear frequently.

Impact

Some (< 50%)

Available workarounds?

No but the platform is still usable

Logs or notes

No response

[pfefferle]

phew... that is hard to debug, but I will keep my eyes open if I can see similar issues!

[obenland]

Looks like this gets triggered within remove_menu_page() when the global $menu is null. I've not been able to re-create it.

https://github.com/WordPress/wordpress-develop/blob/6.7/src/wp-admin/includes/plugin.php#L1853

@rghedin We'll keep an eye out for it but will close for now since it's not reproducible. Please feel free to re-open when that changes!

[rghedin]

Maybe it isn't related to AP plugin, after all. I searched my WordPress theme for remove_menu_page() references and found a couple on functions.php. Probably the culprit.

Sorry about the false alarm, @obenland!