Bug #65629 [Com]: SplObjectsStorage::detach() rewinds internal pointer

From: Date: Tue, 05 Oct 2021 15:57:02 +0000
Subject: Bug #65629 [Com]: SplObjectsStorage::detach() rewinds internal pointer
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-237054@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=65629&edit=1

 ID:                 65629
 Comment by:         artter178 at gmail dot com
 Reported by:        alan dot bem at gmail dot com
 Summary:            SplObjectsStorage::detach() rewinds internal pointer
 Status:             Assigned
 Type:               Bug
 Package:            SPL related
 PHP Version:        Irrelevant
 Assigned To:        levim
 Block user comment: N
 Private report:     N

 New Comment:

Dear php team, can you fix this behaviour?


Previous Comments:
------------------------------------------------------------------------
[2018-08-19 16:49:10] cmb@php.net

> It's behaviour should be more similar to ArrayObject, it's less
> confusing that way.

Is it less confusing?  Consider:

    <?php
    $items = new ArrayObject(range(1, 10));
    foreach ($items as $key => $val) {
        unset($items[$key]);
    }
    print_r($items->getArrayCopy());

prints:

    Array
    (
        [1] => 2
        [3] => 4
        [5] => 6
        [7] => 8
        [9] => 10
    )

------------------------------------------------------------------------
[2015-07-20 10:08:56] bas at dmt-software dot nl

SplObjectsStorage::attach() does change the pointer too.
These operations should not change the internal pointer at all.
It's behaviour should be more similar to ArrayObject, it's less confusing that way.

------------------------------------------------------------------------
[2013-09-21 23:02:47] levim@php.net

Bug #63917 is a duplicate of this one (has a phpt uploaded -- might be useful).

------------------------------------------------------------------------
[2013-09-21 22:58:59] levim@php.net

Related To: Bug #63917

------------------------------------------------------------------------
[2013-09-12 22:49:38] levim@php.net

Regardless of whether this is a bug, in general modifying a structure during 
iteration has undefined behavior. I will look a bit into this and see what might 
be done.

------------------------------------------------------------------------


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the rest of the comments, please view the bug report online at

    https://bugs.php.net/bug.php?id=65629


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