php
Documentation of operators should include the info about which PHP versions support them
Affected page
https://www.php.net/manual/en/language.operators.assignment.php (and other operator pages)
Current issue
I wanted to check in which version ??= was added (as my day-to-day work uses a recent PHP version where I'm able to use it, but my open-source contributions can have to deal with support for older versions and I forgot whether I could use that operator in such code or no). My first attempt was to look at the official documentation, expecting to have such info available (similar to how documentation for functions or classes provides this info). However, this info is not available.
Suggested improvement
It would be great to have the info about supported versions for each operator.
Additional context
Just in case anyone comes across this ticket and is wondering - ??= was added in PHP 7.4 ;-)
This is effectively available on the token appendix page: https://www.php.net/manual/en/tokens.php
