Doc #62537 [Com]: Composed class has fatal error with duplicate, equal array properties
Edit report at https://bugs.php.net/bug.php?id=62537&edit=1
ID: 62537
Comment by: walle dot sthlm at gmail dot com
Reported by: jeremeamia at gmail dot com
Summary: Composed class has fatal error with duplicate, equal
array properties
Status: Verified
Type: Documentation Problem
Package: Class/Object related
Operating System: *
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
The following snippet results in the "definition differs and is considered incompatible"
fatal error in 7.0+. Can this be considered as a bug?
const VALUE = true;
trait Foo {public $var = VALUE;}
trait Bar {public $var = VALUE;}
class Baz {use Foo, Bar;}
https://3v4l.org/kkHFe
Previous Comments:
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[2017-03-13 18:34:56] tularis@php.net
Automatic comment from SVN on behalf of tularis
Revision: http://svn.php.net/viewvc/?view=revision&revision=342111
Log: Documents the issue described in bug 62537.
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Provided by Pedro Magalhães (mail@pmmaga.net)
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[2017-02-09 17:40:36] mail at pmmaga dot net
I've included a patch for the documentation on this ticket as well.
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[2017-02-07 23:45:09] requinix@php.net
The documentation is indeed out of date.
No E_STRICT in PHP 7:
- https://3v4l.org/Jafoi matching in two traits
- https://3v4l.org/pQYTl matching in traits and class
Conflicting definitions:
- https://3v4l.org/brZt0 conflict between traits
- https://3v4l.org/umfVE conflict between trait and class
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[2017-02-07 23:09:12] mail at pmmaga dot net
In PHP7.0, this E_STRICT was dropped as described in the 7.0 docs: http://php.net/manual/en/migration70.incompatible.php
> Same (compatible) property in two used traits - Notice removed, triggers no error
However, the documentation on traits still mentions the E_STRICT.
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[2013-09-19 09:10:51] gron@php.net
I believe this is going to be problematic, because the object/array is not the
same, i.e., it is not the same literal, and I assume that I currently check for
object identity. Object identity works for most literals, but not arrays.
To fix this, special care is required. A value comparison might be possible, and
would be necessary here. A simple check for the type is not sufficient, because
$var = 1; vs $var = 2; should result in the expected error.
But yes, in general, I consider this behavior a bug.
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Thread (5 messages)