When PHP changes are made on your site (usually from upgrading the PHP version), you may find that PHP throws errors and warnings. In the past, these would display on your website and you could turn them off using a phprc file.
DreamHost now disables all PHP warnings by default. This means you should never see them on your website when making changes to PHP.
Where can I view PHP errors and warnings?
Since these warnings have been turned off globally, you won't see them on your site. But you can still see all PHP errors and warnings in your error.log file.