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Date: Tue, 23 Sep 2014 12:34:26 +0300
Message-ID: <CAPhkiZxKf5axFJ4dEAYddg+ec3-BBNB5831exLJGZCxy6QL5eA@mail.gmail.com>
To: Andrea Faulds <ajf@ajf.me>
Cc: Leigh <leight@gmail.com>, Michael Wallner <mike@php.net>, 
	Nicolai Scheer <nicolai.scheer@gmail.com>, PHP Internals <internals@lists.php.net>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [PHP-DEV] Invokation on __toString() for object used as array key
From: narf@devilix.net (Andrey Andreev)

On Tue, Sep 23, 2014 at 12:29 PM, Andrea Faulds <ajf@ajf.me> wrote:
>
>> On 23 Sep 2014, at 10:15, Leigh <leight@gmail.com> wrote:
>>
>>> On 23 September 2014 09:51, Michael Wallner <mike@php.net> wrote:
>>>
>>> Yes, it was removed intentionally (quite a long time ago), like using
>>> resources as array keys, to avoid hard-to-trace bugs for the user. At
>>> least that's the reasoning I can remember.
>>
>> He doesn't want to add the object as a key, he wants to invoke __toString().
>>
>> Is there really any harm in adding a IS_OBJECT case to
>> zend_whatever_add_array_element, and checking if it has a __toString?

It does work if you do an explicit cast to string:

class Foo {
    public function __toString()
    {
        return 'Bar';
    }
}

$array = array();
$object = new Foo();
$array[(string) $object] = 'this works';

Cheers,
Andrey.