On 4/26/2016 9:13 PM, Bob Weinand wrote: > There's undefined (= not a value) and there's the value null. We just don't > expose undefined to userland. [You see it when accessing undefined variables, > which PHP converts to null with a notice for example.] > > Null is definitely a value. You can pass it around, reflect on it, assign it > etc.. > And as it is a value, it also has a type, which is null. > > Null is not special, it just has specific behavior, like any other primitive > type has. The only special thing is that it's allowed as a default value with > function (Foo $foo = null), but this should be somewhen deprecated and > removed once we have proper null unions. > > If you want to continue arguing, please open a new thread, but don't > side-track this thread to much, please. > > Bob >
Null is a type, no argument there! Deprecation of null as default value makes no sense, nor does it make sense to deprecate 42 as default value. ;) -- Richard "Fleshgrinder" Fussenegger
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