not-found.php

The not-found file is used to render UI when the notFound function is thrown within a route segment. Along with serving a custom UI, Prisma PHP will return a 200 HTTP status code for streamed responses, and 404 for non-streamed responses.

Good to know: In addition to catching expected notFound errors, the root app/not-found.php file also handles any unmatched URLs for your whole application. This means users that visit a URL that is not handled by your app will be shown the UI exported by the app/not-found.php file.