From:
Operating system: Ubuntu Natty
PHP version: 5.4.0alpha3
Package: Class/Object related
Bug Type: Bug
Bug description:Issues with numeric string keys in objects
Description:
------------
If you have an object with numeric string keys such as "1", serialize() and
unserialize() will not round-trip cleanly: if $foo = array("1" =>"foo"),
unserialize(serialize($foo)) will be array(1=>"foo").
I'm not actually sure this is a bug in serialize()/unserialize(); it seems
to be a bug in json_decode() instead. Somewhat counter-intuitively, arrays
or objects with numeric string keys are really hard to produce. Constructs
like array("1"=>"foo") or even $s = "1"; $arr[$s] = "foo"; produce an array
with int(1) as the key rather than string("1"). The same is true for
objects. The only thing that produces numeric string keys, AFAIK, is
json_decode().
A very related bug, and the reason I noticed this in the first place, is
that if you have an object with numeric keys and set $s = "2" , $obj->{$s}
will not return the value for key 2. Worse, it seems there's no way to
access the value short of casting the object to an array and using
$arr[2].
Related bugs have been filed and closed, but they don't seem to have
addressed this issue properly:
#48557: patch applied to 5.2 and 5.3; I found this bug in 5.4
#48171: basically the same problem, marked as bogus referring to #48959 ,
which is about arrays not objects. It claims to have been documented in the
manual, but again that refers to arrays not objects
Test script:
---------------
<?php
error_reporting(E_ALL);
$s = "2";
$i = 2;
$foo = json_decode('{"1":"foo","2":"bar"}');
$ser = serialize($foo);
$bar = unserialize($ser);
var_dump($foo);
var_dump($ser);
var_dump($bar);
var_dump($foo->{$s});
var_dump($foo->{$i});
var_dump($bar->{$s});
var_dump($bar->{$i});
Expected result:
----------------
object(stdClass)#1 (2) {
["1"]=>
string(3) "foo"
["2"]=>
string(3) "bar"
}
string(55) "O:8:"stdClass":2:{s:1:"1";s:3:"foo";s:1:"2";s:3:"bar";}"
object(stdClass)#2 (2) {
["1"]=>
string(3) "foo"
["2"]=>
string(3) "bar"
}
string(3) "bar"
string(3) "bar"
string(3) "bar"
string(3) "bar"
Actual result:
--------------
object(stdClass)#1 (2) {
["1"]=>
string(3) "foo"
["2"]=>
string(3) "bar"
}
string(55) "O:8:"stdClass":2:{s:1:"1";s:3:"foo";s:1:"2";s:3:"bar";}"
object(stdClass)#2 (2) {
[1]=>
string(3) "foo"
[2]=>
string(3) "bar"
}
string(3) "bar"
string(3) "bar"
Notice: Undefined property: stdClass::$2 in
/home/catrope/php-5.4.0alpha3/testcase.php on line 13
NULL
Notice: Undefined property: stdClass::$2 in
/home/catrope/php-5.4.0alpha3/testcase.php on line 14
NULL
--
Edit bug report at https://bugs.php.net/bug.php?id=55495&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=55495&r=trysnapshot54
Try a snapshot (PHP 5.3):
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Try a snapshot (trunk):
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Fixed in SVN:
https://bugs.php.net/fix.php?id=55495&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=55495&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=55495&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=55495&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=55495&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=55495&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=55495&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=55495&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=55495&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=55495&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=55495&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=55495&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=55495&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=55495&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=55495&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=55495&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=55495&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=55495&r=mysqlcfg
