@wouterj is there a way to get this applied to the 2.8.* branch?

@nerdstein when this PR is merged, the code from 2.3 is merged into 2.7 and 2.8 and will be included in the next 2.8 release.

@wouterj Can you add a test?

👍

Done

In the past, a change like this was rejected as we do not really know if the PHP array really was supposed to be a sequence or a mapping (see for example #9870). And this would also mean to break applications that rely on the current behaviour.

hmm, @xabbuh is right, closing then.

Maybe we should introduce dumper options to let people do this (see #17520).