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Date: Tue, 12 Dec 2006 10:42:38 +0100
Message-ID: <00A2E2156BEE8446A81C8881AE117F1949C843@companyweb>
Thread-Topic: foreach with referenced values
Thread-Index: Accd0dwPXgM/xxgtQcWrhXVFyaBvng==
To: <internals@lists.php.net>
Subject: foreach with referenced values
From: mp@webfactory.de ("Matthias Pigulla")

Hi internals,

please consider:

<?php
 print PHP_VERSION . "\n";
 $a =3D array('a', 'b');
 foreach ($a as &$ref) ;
 $b =3D $a;
 $a[0] =3D '*';
 print_r($b);
?>

Result:
5.2.0
Array
(
    [0] =3D> *
    [1] =3D> b
)

Same with 5.1.4 and 5.1.6. I suppose that using foreach and referencing
the values turns the elements in $a into references, $b is a copy of the
array containing *references* and thus chaning the value of the first
element in $a is visible in $b because both arrays reference the the
same value?

When moving the $b assignment before the foreach, everything works as
expected.

Is this really intended behaviour?

Kind regards,
mp.