Bug #73622 [Nab]: Foreach iteration with a previously initialized variable
| From: | dorin dot marcoci at gmail dot com | Date: | Thu, 01 Dec 2016 13:13:06 +0000 |
| Subject: | Bug #73622 [Nab]: Foreach iteration with a previously initialized variable | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-205711@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=73622&edit=1
ID: 73622
User updated by: dorin dot marcoci at gmail dot com
Reported by: dorin dot marcoci at gmail dot com
Summary: Foreach iteration with a previously initialized
variable
Status: Not a bug
Type: Bug
Package: Scripting Engine problem
PHP Version: 7.0.13
Block user comment: N
Private report: N
New Comment:
The problem is that foreach performs differently.
This script:
<?php
$A = new stdClass();
$A->Code = 'one';
$B = new stdClass();
$B->Code = 'two';
$H = [$A, $B];
$C = &$A;
foreach ($H as $C)
echo ' '.$C->Code;
?>
Outputs: " one two", even if $C initially was a reference.
BUT this one:
<?php
$A = new stdClass();
$A->Code = 'one';
$B = new stdClass();
$B->Code = 'two';
$H = [$A, $B];
foreach ($H as &$C);
foreach ($H as $C)
echo ' '.$C->Code;
?>
Outputs: " one one", Surprise!.
Previous Comments:
------------------------------------------------------------------------
[2016-12-01 07:22:24] a at b dot c dot de
So you want variable references in this particular instance to behave differently from the way they
behave in the rest of the language? Not gonna happen.
------------------------------------------------------------------------
[2016-11-30 09:24:00] dorin dot marcoci at gmail dot com
OK, big red warning is not an excuse. This IS definitely a bug.
When I do foreach($Array AS $VAR) then it should return in var a NEW $VAR instance in any way, was
it used previously or not.
------------------------------------------------------------------------
[2016-11-30 09:12:43] requinix@php.net
Please take note of the big red warning in the documentation.
http://php.net/manual/en/control-structures.foreach.php
------------------------------------------------------------------------
[2016-11-30 09:09:03] dorin dot marcoci at gmail dot com
Description:
------------
Script below output A A instead of A B.
Is this as designed?
If I do unset($Item) before second foreach then it works as expected.
Test script:
---------------
<?php
$Items = [['Code' => 'A'], ['Item' => 'B']];
foreach ($Items as &$Item)
$Item['Hash'] = rand(1, 10);
foreach ($Items as $Item)
echo ' '.$Item['Code'];
Expected result:
----------------
A B
Actual result:
--------------
A A
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=73622&edit=1