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To: Tobias Nyholm <tobias.nyholm@gmail.com>
CC: Ilija Tovilo <tovilo.ilija@gmail.com>, PHP internals
	<internals@lists.php.net>
Thread-Topic: [PHP-DEV] [RFC][Under discussion] Arbitrary string interpolation
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Date: Fri, 18 Mar 2022 04:49:21 +0000
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Subject: Re: [PHP-DEV] [RFC][Under discussion] Arbitrary string interpolation
From: theodorejb@outlook.com (Theodore Brown)

On Thu, Mar 17, 2022 at 5:40 PM Tobias Nyholm <tobias.nyholm@gmail.com> wro=
te:=0A=
=0A=
> On Thu, 17 Mar 2022, 23:27 Ilija Tovilo, <tovilo.ilija@gmail.com> wrote:=
=0A=
>=0A=
>> Hi everyone=0A=
>>=0A=
>> I'd like to start discussion on a new RFC for arbitrary string=0A=
>> interpolation.=0A=
>> https://wiki.php.net/rfc/arbitrary_string_interpolation=0A=
>>=0A=
>> Let me know what you think.=0A=
>=0A=
> That is a cool idea.=0A=
> But I am not a big fan of having code in strings.=0A=
> Wouldn=92t this open the door to all kinds of new attacks?=0A=
=0A=
Do you have an example of a new kind of attack this would allow?=0A=
The proposal doesn't enable interpolation of strings coming from=0A=
a database or user input - it only applies to string literals=0A=
directly in PHP code.=0A=
=0A=
Personally I'm really looking forward to having this functionality.=0A=
Just a couple days ago I wanted to call a function in an interpolated=0A=
string, and it was really annoying to have to wrap the function in a=0A=
closure in order to use it.=0A=
=0A=
If this RFC is accepted I'd be able to replace code like this:=0A=
=0A=
    $name =3D "Theodore Brown";=0A=
    $strlen =3D fn(string $string): int =3D> strlen($string);=0A=
    echo "{$name} has a length of {$strlen($name)}.";=0A=
=0A=
with=0A=
=0A=
    $name =3D "Theodore Brown";=0A=
    echo "{$name} has a length of {$:strlen($name)}.";=0A=
=0A=
=0A=
Sincerely,=0A=
=0A=
Theodore=