"Undefined variable" even though passed by reference

[iluuu1994]

This piece of code:

https://phpstan.org/r/2afd6c3d-870c-4d24-a53b-33abfcddef53

$nonce = random_bytes(16);
openssl_encrypt('data', 'aes-128-gcm', 'key', 0, $nonce, $tag);

Produces an error:

Undefined variable: $tag

I thought the functionMap was wrong but it's correct:

phpstan/src/Reflection/SignatureMap/functionMap.php

Line 8061 in effac12

'openssl_encrypt' => ['string|false', 'data'=>'string', 'method'=>'string', 'key'=>'string', 'options='=>'int', 'iv='=>'string', '&rw_tag='=>'string', 'aad='=>'string', 'tag_length='=>'int'],

rw_tag is defined as a reference.

Any clue why this is happening?

[ondrejmirtes]

If it can create a new variable, it should be just &w_tag.

[iluuu1994]

Why? A reference can be optional or non-optional:

https://3v4l.org/3acu7

[ondrejmirtes]

Please check out PassedByReference class and SignatureMapParser. User land functions are a separate problem. It was discussed in depth somewhere, I might be able to find it.

On Mon, 25 Mar 2019 at 13:33, Ilija Tovilo ***@***.***> wrote: Why? A reference can be optional or non-optional: https://3v4l.org/3acu7 — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#2026 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAGZuPlbk1QGL49dL92pubZLub_98NaUks5vaMIogaJpZM4cGbL9> .

-- Ondřej Mirtes

[ondrejmirtes]

#1916 If you can improve this situation without breaking anything that would be nice 😊

On Mon, 25 Mar 2019 at 13:36, Ondřej Mirtes ***@***.***> wrote: Please check out PassedByReference class and SignatureMapParser. User land functions are a separate problem. It was discussed in depth somewhere, I might be able to find it. On Mon, 25 Mar 2019 at 13:33, Ilija Tovilo ***@***.***> wrote: > Why? A reference can be optional or non-optional: > > https://3v4l.org/3acu7 > > — > You are receiving this because you commented. > > > Reply to this email directly, view it on GitHub > <#2026 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AAGZuPlbk1QGL49dL92pubZLub_98NaUks5vaMIogaJpZM4cGbL9> > . > -- Ondřej Mirtes

-- Ondřej Mirtes