On 5/20/22 04:05, Ilija Tovilo wrote:
> Hi everyone
>
> It was pointed out to me that unfortunately the "Deprecate ${} string
> interpolation" RFC didn't specify *how* the feature would be removed
> in PHP 9.
>
> https://wiki.php.net/rfc/deprecate_dollar_brace_string_interpolation
> https://github.com/php/php-src/issues/8501
>
> There are two approaches:
>
> * Completely remove the syntax and make "${}" result in the literal string "${}"
> * Keep the syntax in the parser but throw an error
>
> It's pretty clear to me that the latter is preferable for two reasons:
>
> 1. People upgrading directly from <=PHP 8.1 to PHP 9.0 or people who
> have not addressed the deprecations will still get an appropriate
> compile-time error message instead of their code suddenly behaving
> differently.
> 2. We can reuse the syntax at some point without causing another BC break.
>
> The only advantage of the former approach I can think of is easier (or
> rather no) escaping of ${} in strings but this could also be a
> drawback considering that it would become unclear what the original
> intent of the code was (literal output or string interpolation).
>
> So unless there are concerns I will amend that in the RFC.
>
> Regards,
> Ilija
>
In my reading of the RFC, I assumed the first approach: completely
remove the syntax and make "${}" result in the literal string "${}".
IMO, this is not an insignificant change to the RFC. I'd like to hear
from those who voted on the RFC before you make this change.
Cheers,
Ben
