PHP Fatal error: Uncaught Error: Call to undefined function wp()

Try to re-upload the WordPress core files via manual update. See: https://www.ads-software.com/documentation/article/updating-wordpress/#manual-update

After that, I would recommend you run an antivirus scan, e.g. with Wordfence. Because something like this doesn’t just happen. If necessary, secure your project, see: https://developer.www.ads-software.com/advanced-administration/security/hardening/

Thank you! for responding….. would it work if I simply click the re-install button on the update backend?

If this is available to you, of course. I assumed that the backend would not work at all due to the error.

Hi @wynot,

It’s probably an issue with the WordPress configuration file (wp-config.php) located at the root of your WordPress installation.

The wp-blog-header.php file is one of the core files, and it’s called quite early in the?WordPress request lifecycle, so an error message that mentions it means that something is not working at the most basic level.

If you have a backup system in place, recover a previous backup to see if this solves the issue easily.

But if it doesn’t, you must check the wp-config.php file for extraneous info against the sample config file provided by WordPress. You can access the wp-config.php file via SFTP (with an app like Ciberduck) or any other visual file manager. Check with your hosting provider’s support to see if they provide this functionality.

I hope this helps.

• This reply was modified 3 days, 15 hours ago by Márcio Duarte.
• This reply was modified 3 days, 15 hours ago by t-p.

Ok Thank you so much!