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Opened 3 years ago

Closed 3 years ago

#52008 closed defect (bug) (duplicate)

Warning: array_intersect_key()

Reported by: andrewnz's profile AndrewNZ Owned by:
Milestone: Priority: normal
Severity: normal Version: 5.6
Component: REST API Keywords: needs-testing
Focuses: Cc:


I see this bug is already reported ticket number: #51986, but I have some more information that may be useful.

After my site was updated to WordPress 5.6, I started to see an error when I Exit to Dashboard from the Elementor page builder when I am editing a post.

Warning: array_intersect_key(): Expected parameter 1 to be an array, string given in /wp-includes/rest-api/class-wp-rest-server.php on line 1402.

This error only show on a blank page for a few seconds then the edit page screen shows up.

There does not seem to be any problem for the public facing part of the site.

In researching the error I came across this post:

Which talked about "special chars it raises the error". I realised that I am using post categories for languages on the site with special characters for example "Galería de Imágenes", which is the posts I am creating and saving.

Since I have been using these Post Categories for 18 months, with no problem, I assume something in the recent update to WordPress 5.6 has caused the problem.


At this time I have not tried disabling plugins or themes, as I would need to clone to a staging site before I attempt such actions. If that would be useful please let me know as I can do that if needed.

Change History (1)

#1 @desrosj
3 years ago

  • Component changed from General to REST API
  • Milestone Awaiting Review deleted
  • Resolution set to duplicate
  • Status changed from new to closed

Hi @AndrewNZ,

Welcome to Trac!

This seems like a duplicate report of #51986. I’m going to close this one out so that we can keep all related conversation in one location.

If I’m mistaken, feel free to reopen this with more details.

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