PHP Selector allows users to manage their PHP versions via CloudLinux ALT-PHP. Follow the details in this article to disable this functionality. Disabling the feature "Select PHP version" only removes the interface from cPanel. It doesn't disable this functionality or accounts already using the PHP selector.
- Login to WHM
- Navigate to CloudLinux Manager
- In the "PHP" module, select "Manage"
- Click the dropdown for Selector is "enabled"
- Change the setting to disabled