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Date: Tue, 28 May 2013 11:20:10 +0200
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To: Maciek Sokolewicz <maciek.sokolewicz@gmail.com>
Cc: Lars Strojny <lars@strojny.net>, Ferenc Kovacs <tyra3l@gmail.com>, 
	PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] supporting the final keyword for properties
From: amaury@amaury.net (Amaury Bouchard)

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2013/5/28 Maciek Sokolewicz <maciek.sokolewicz@gmail.com>

> It=92s a good idea in general but what about having it for variables as
>> well? Could open interesting possibilities for an optimizer.
>>
>> final $foo =3D "str";
>> $foo =3D "bar"; // bails out
>>
>>  Don't we already have that? It just has a different name: constants.


It's different. You can manipulate variables in some ways you can't with
constants.

This code, for example:
   $a =3D 'abc';
   $b =3D 'a';
   print($$b);

It will display "abc". It's currently not possible to do something similar
with constants.

I think the subject was already debated, but I wonder why we should write
that:
   final $foo =3D 'bar';
instead of:
   const $foo =3D 'bar';

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