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Date: Fri, 9 Mar 2012 18:45:19 +0100
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To: Lazare Inepologlou <linepogl@gmail.com>
Cc: Anthony Ferrara <ircmaxell@gmail.com>, internals@lists.php.net
Content-Type: text/plain; charset=UTF-8
Subject: Re: [PHP-DEV] [POC - Patch] Scalar Type Hinting - A-La zend_parse_parameters
From: simonsimcity@googlemail.com (Simon Schick)

2012/3/9 Lazare Inepologlou <linepogl@gmail.com>
>
> Type casting combined with passing by reference is problematic in many ways. Just an example:
>
> fuction foo( string & $buffer) { ... }
> foo( $my_buffer );
>
> Here, $my_buffer has just been declared, so it is null. Should this be an error? I don't know! So, I think that that passing by reference should not be (immediately) supported.
>

Hi, Lazare

This should at least throw an E_NOTICE :) And also an error as NULL is
not allowed here.

Let me modify your example:

fuction foo( string & $buffer = NULL) { ... }
foo( $my_buffer );

This would only raise the E_NOTICE because the variable has not been declared.
Or would you say that NULL is equal with an empty string (talking
about implicit casting)? I would not like that, but if, don't let it
be (int)0 or (bool)false as well.

Bye
Simon