Question
Why there are changes in WordPress core files (wp-admin/includes/upgrade.php
, wp-includes/functions.php
and wp-includes/load.php
) in a WordPress instance that was installed from Plesk Application catalog?
Answer
The mentioned changes in the WordPress core files wp-admin/includes/upgrade.php
, wp-includes/functions.php
and wp-includes/load.php
​ are part of the expected behavior of the Plesk Application Catalogue: These changes are implemented during WordPress instance installation from Domains > example.com > Applications.
It is recommended to install WordPress instances via WP Toolkit from Plesk > WordPress > Install. When a WordPress instance is installed via WP Toolkit, no changes are implemented in the WordPress core files.