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Bug #35560 Failure on list($a, $b) = $b
Submitted: 2005-12-05 21:27 UTC Modified: 2005-12-12 08:38 UTC
Avg. Score:3.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: ktk at bigfoot dot com Assigned: dmitry (profile)
Status: Not a bug Package: Arrays related
PHP Version: 5.1.1 OS: GNU/Linux
Private report: No CVE-ID: None
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From: ktk at bigfoot dot com
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 [2005-12-05 21:27 UTC] ktk at bigfoot dot com
In PHP 5.1 the list() operator fails to correctly assign values to variables that appear left of the variable that is used as the source array, if the source variable is itself listed as one of the variables to be assigned.

list($a, $b) = $b; fails to properly assign $a.

PHP 5.0 and earlier have no problem with this syntax.

Reproduce code:
$c = array("Apple", "Banana", "Pear", "Grape", "Orange");
list($a, $b, $c, $d, $e) = $c;

Expected result:
string(5) "Apple"
string(6) "Banana"
string(4) "Pear"
string(5) "Grape"
string(6) "Orange"

Actual result:
string(1) "P"
string(1) "e"
string(4) "Pear"
string(5) "Grape"
string(6) "Orange"


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 [2005-12-05 21:39 UTC]
Dmitry, is there something we can do about it?
It definitely looks wrong to me, but somehow it works in 5.0.
 [2005-12-12 08:38 UTC]
Duplicated. See
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