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Date: Sun, 10 Jul 2016 17:01:20 -0700
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Subject: Re: [PHP-DEV] [RFC] [Vote] var_info
From: smalyshev@gmail.com (Stanislav Malyshev)

Hi!

>>  * Make is_object() return true for IncompleteClass. This is just
>> ridiculous. I care zero about the theoretical BC impact.
> 
> I have no idea why it doesn't do so. I'll try to dig up when it was made
> so and see if there's some explanation.

This is the change that caused it:

commit 7b3fb771e4b022a8bf74b1a881dbec67d3ad460b
Author: Yasuo Ohgaki <yohgaki@php.net>
Date:   Wed Jul 24 09:55:11 2002 +0000

    is_object() returns FALSE if object is a "incomplete object".
    Raise E_NOTICE, instead of E_ERROR, for setting/getting properties
    to/from a "incomplete object".

There's some discussion on this patch:
http://grokbase.com/t/php/php-dev/027rwwmc8k/php-cvs-cvs-php4-ext-standard-incomplete-class-c-php-incomplete-class-h-type-c

There are references to previous discussions but I couldn't find it.
Yasuo, I realize it was a long time ago, but maybe you remember why it
was done and can weight in on this?

-- 
Stas Malyshev
smalyshev@gmail.com