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Bug #47388 Array Foreach Reference Broken
Submitted: 2009-02-14 19:47 UTC Modified: 2009-02-16 19:32 UTC
From: martin at itmission dot com Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.3.0beta1 OS: Windows XP
Private report: No CVE-ID: None
 [2009-02-14 19:47 UTC] martin at itmission dot com
Description:
------------
When using foreach on an array using the reference syntax, stuff breaks later.

Reproduce code:
---------------
<?php

$a = array(0, 1, 2, 3, 4);

foreach($a as $k => &$v)
{
	$v++;
}

foreach($a as $k => $v)
{
	echo("$k => $v\n");
}

?>

Expected result:
----------------
0 => 1
1 => 2
2 => 3
3 => 4
4 => 5

Actual result:
--------------
0 => 1
1 => 2
2 => 3
3 => 4
4 => 4

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 [2009-02-16 18:57 UTC] martin at itmission dot com
Also happens in 5.2.8
 [2009-02-16 19:15 UTC] derick@php.net
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions.  Due to the volume
of reports we can not explain in detail here why your report is not
a bug.  The support channels will be able to provide an explanation
for you.

Thank you for your interest in PHP.

.
 [2009-02-16 19:32 UTC] martin at itmission dot com
The error is in my code.  Sorry.  Always unset variables after a foreach with a reference unless you know what you are doing.

unset($v);
 [2015-01-01 20:19 UTC] chealer at gmail dot com
The problematic behavior behind this issue is being tracked in #62132.
 
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