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Date: Wed, 13 Jan 2010 14:50:17 +0100
Message-ID: <e666c3891001130550w2cff0a6cm3f8101e2501a3ce2@mail.gmail.com>
To: "mathieu.suen" <mathieu.suen@easyflirt.com>
Cc: internals@lists.php.net
Content-Type: text/plain; charset=ISO-8859-1
Subject: Re: [PHP-DEV] Inconsistency redesign
From: colder@php.net (Etienne Kneuss)

Hello,

On Wed, Jan 13, 2010 at 2:36 PM, mathieu.suen
<mathieu.suen@easyflirt.com> wrote:
> Hi,
>
> I came across this:
>
> echo sizeof(array());
> echo sizeof("");
> $a = "";

php.net/count:
"If var is not an array or an object with implemented Countable
interface, 1 will be returned. There is one exception, if var is NULL,
0 will be returned."

> var_dump( empty($a));
> $a = array();
> var_dump(empty($a));

php.net/empty

empty($var) is basically an !isset($var) || !$var

it's not related to count in anyway.

>
> So funny! How something can have a size greater than 0 but still be empty?
> I think PHP is reinventing the inconsistency word.

I think such comments are pretty useless. Try coming with a viable
solution as a patch instead.

>
> But then let assume that empty is just making a cast in array.

If you assume wrong, you can derive all kind of madness.

> $a = "";
> empty($a) //true
> empty((array)$a) //false
>
> Ok so empty is big ugly switch case on type.

No, it's a boolean check, with type juggling involed, see above.

>
> empty(0); //true
> empty(45); //false
>
> Wooow reinventing emptiness on number....
>
> -- Mathieu Suen
>
>
>
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>



-- 
Etienne Kneuss
http://www.colder.ch