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Date: Mon, 09 Apr 2012 21:21:46 +0200
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To: Chris Stockton <chrisstocktonaz@gmail.com>
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Subject: Re: [PHP-DEV] RFC: source files without opening tag
From: keisial@gmail.com (=?ISO-8859-1?Q?=C1ngel_Gonz=E1lez?=)

On 09/04/12 20:23, Chris Stockton wrote:
> Hello,
> Although I am not very interested in this feature, if it is
> implemented I like the idea of flags instead of introducing new
> keywords. Maintaining backwards compatibility would be great
> considering the benefit to the feature to be completely honest (and in
> disagreement to many people, but I do understand the reasoning for
> everyone's interest in it) is extremely minor in my eyes.
>
> In addition I would suggest maybe using PHP_INCLUDE_* as a place for
> these constants to live.
>
> -Chris
That would still be a parse error.
Either
include "file.php", 5;
or
include ("file.php", 42);

Fails with a parse error about unexpected ','

On the other hand, a new keyword can be written in a backwards
compatible way by making it look like a function call in a non-taken branch:

*if ( version_compare(PHP_VERSION*, '5.5', '<') )
  include_once $file;
else
  require_code($file, array( 'once'=>true, 'warn' => 'ignore' ) );