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Date: Sat, 8 Mar 2014 22:48:22 +0100
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To: Andrea Faulds <ajf@ajf.me>
Cc: internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Idea: ifdef-like feature to ease userland BC
From: marco+php@m-s-d.eu (Marco Schuster)

Hi,

On Sat, Mar 8, 2014 at 10:40 PM, Andrea Faulds <ajf@ajf.me> wrote:
>
> On 8 Mar 2014, at 21:36, Marco Schuster <marco+php@m-s-d.eu> wrote:
>
> especially with (radical) userland API changes coming up in PHP6,
> might I suggest something like a ifdef feature which turns blocks of
> code into comments?
>
>
> Why is that needed? PHP checks function names and arguments at runtime, not
> compile-time. You can already do this:
>
> if (some_condition) {
>     PHP_5_6_function();
> } else {
>     PHP_5_2_function();
> }
>
This breaks if you use new syntax features like the array shortcut
$var=[];, traits or similar.

Marco