Hi Andrea, This is great -- thanks to you and Nikita for the work here.
Syntax wise, I would prefer a function-like syntax, e.g. coalesce($a, $b, 'c') or ifsetor() instead of $a ?? $b ?? 'c'. I find this more readable, and it avoids any possible confusion about precedence within the expressions. Either way, still +1 for this feature. Best regards, --Matthew
