Bug #63179 [Dup]: foreach: Using variable reference leads to inconsistent data
Edit report at https://bugs.php.net/bug.php?id=63179&edit=1
ID: 63179
User updated by: uli dot staerk at globalways dot net
Reported by: uli dot staerk at globalways dot net
Summary: foreach: Using variable reference leads to
inconsistent data
Status: Duplicate
Type: Bug
Package: Scripting Engine problem
Operating System: Linux
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
The manual says: "On each iteration, the value of the current element is assigned to
$value".
This is not correct if you have a look at my example. The manual claims that an assignment happens,
but the reference has some magic override here.
Either you must fix this "consistent" implementation, or you have to fix the documentation
like "it will not be correctly assigned if $value is a reference".
Previous Comments:
------------------------------------------------------------------------
[2012-09-29 02:52:29] laruence@php.net
dup to #50485
------------------------------------------------------------------------
[2012-09-28 21:26:52] notzippy at gmail dot com
A variable that is the target of a foreach should be intrinsically unset and not need a manual
process to do it.
------------------------------------------------------------------------
[2012-09-28 15:16:44] uli dot staerk at globalways dot net
Description:
------------
As you can see from the example, php seems to mix up variables if you use the reference in a
foreach.
Despite the report bug 43806, I still think this is a bug. The variable must be set when calling
foreach and must not be influenced by any previous code.
Test script:
---------------
<?php
$testdata = array(
0 => array('foo' => 'foo'),
1 => array('bar' => 'bar')
);
foreach($testdata as &$value) {}
foreach($testdata as $key => $value) {
if($key == 1) {
print_r($value);
}
}
Expected result:
----------------
Array
(
[bar] => bar
)
Actual result:
--------------
Array
(
[foo] => foo
)
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=63179&edit=1
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