[RFC] [Discussion] Arrays starting with a negative index

Hi internals, I want to bring up this RFC once again given that now seems to be the right timing for it. I have previously canceled the vote when I initially proposed this to land on 7.2 which was seen as too big of a BC for a minor version. On a second attempt targeting 8.0 I have also canceled the vote as the inclusion of a deprecation notice in cases where the behavior will change warranted further discussion. To address these issues, the current version of the RFC will have 2 separate votes: - Introduce the new behavior on 8.0 - Introduce a deprecation notice on 7.3 For those not familiar with the RFC, the general idea is that currently, any array that has a number n as it's first numeric key will have for it's next implicit key either n+1 if n >= 0 or 0 if n < 0. This RFC proposes to make this consistent by always using n+1 regardless of the sign of n. In code: $a[-2] = true; // Current: Key is -2, RFC: Key is -2 $a[] = true; // Current: Key is 0, RFC: Key is -1 $a[] = true; // Current: Key is 1, RFC: Key is 0 I invite you to read the full RFC: https://wiki.php.net/rfc/negative_array_index and bring up any issues you see with the current version before the voting period starts. Looking forward for any feedback. Regards, Pedro Magalhães