Re: Allow default parameters before non-default ones?

On 09/12/2021 05:22, André Hänsel wrote:

If I try the same thing in PHP 8.0 I get a Deprecated warning and if I try it in PHP 8.1 I get something that I don't understand: https://3v4l.org/cg4DA

There are two diagnostics showing in 8.1, the deprecation on the declaration, and a fatal error on the call. What's happened is that given your signature:

function blah($foo = "deffoo", $bar) { ... }

PHP has decided it doesn't make sense, and re-interpreted it as this:

function blah($foo, $bar) { ... }

Then when you try to call it:

blah(bar: "1");

You're missing the now-mandatory parameter $foo, so you get a fatal error. I'm not sure exactly why this behaviour has changed, and can't see any mention in the Release or Migration pages in the manual. It's not a *huge* break, because named params have only existed since 8.0, but it is technically a breaking change in a minor version. The only relevant discussion I've found is this, where Nikita is I think hinting at the new behaviour: https://externals.io/message/114007#114026 Regards, -- Rowan Tommins [IMSoP]