Bug #54209 [Opn->Dup]: Inconsistent array index behaviour
Edit report at http://bugs.php.net/bug.php?id=54209&edit=1
ID: 54209
Updated by: aharvey@php.net
Reported by: phristen at yahoo dot com
Summary: Inconsistent array index behaviour
-Status: Open
+Status: Duplicate
Type: Bug
Package: Scripting Engine problem
Operating System: *
PHP Version: 5.3.5
Block user comment: N
Private report: N
New Comment:
Duplicate of numerous bugs, including bug #45959. In short, this is
expected behaviour, and is unlikely to be changed, as doing so would
cause performance issues within PHP.
Previous Comments:
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[2011-03-09 22:25:57] phristen at yahoo dot com
Description:
------------
It is well known that PHP casts numeric string indexes to integers, and
it is normally impossible to force such indexes to remain strings. For
example, the script below will output "integer":
$test = array("123" => 1);
echo gettype(key($test)); // integer
However, it is possible to achieve this if we assign numeric string
property to an object (by using the ->{} syntax), and then cast it to
array. Not only will the index retain it's string type, but it will also
be impossible to access that index with [], which can't be correct
behaviour. See attached example.
Test script:
---------------
<?php
$test = new stdClass();
$test->{"123"} = 1;
$test = (array)$test;
$key = key($test);
echo gettype($key);
echo "\n";
echo $test[$key];
?>
Expected result:
----------------
integer
1
Actual result:
--------------
string
PHP Notice: Undefined index: 123 in test.php on line 9
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Edit this bug report at http://bugs.php.net/bug.php?id=54209&edit=1
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