#49991 [Bgs]: json_decode integer truncation on 32-bit machines
ID: 49991
User updated by: warren at guy dot net dot au
Reported By: warren at guy dot net dot au
Status: Bogus
Bug Type: JSON related
Operating System: FreeBSD 6.3
PHP Version: 5.2.11
New Comment:
I am not asking json_decode to represent a number as an integer, nor
any specific type. It is detecting a numeric value and turning it in to
an integer for me. It seems that if it is able to detect that it is a
numeric value, perhaps it should also be aware that the numeric value is
greater than the max value of the type it is about to be assigned and
use a more appropriate type instead?
It seems counter intuitive that JSON numeric input on a 32 bit machine
should be limited to a 32 bit integer. If for some reason this
limitation is required, it should be obviously documented (it is not).
Side note: if I add '.0' to the end of a number, it becomes a float and
can represent numbers greater than 2147483647.
Previous Comments:
------------------------------------------------------------------------
[2009-10-25 22:55:03] shupp@php.net
FWIW, it works properly on my 32 bit linux machine (debian lenny):
$ php -v
PHP 5.2.6-1+lenny3 with Suhosin-Patch 0.9.6.2 (cli) (built: Apr 26 2009
22:16:23)
Copyright (c) 1997-2008 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies
------------------------------------------------------------------------
[2009-10-25 20:19:43] jani@php.net
How exactly would it work when max int size on 32bit is 2147483647 ?
Expected behaviour -> bogus.
------------------------------------------------------------------------
[2009-10-25 16:05:03] warren at guy dot net dot au
Nope, built on same machine it's running. 32 bit machine and OS.
FreeBSD [redacted] 6.3-RELEASE-p11 FreeBSD 6.3-RELEASE-p11 #0: Wed Jun
10 02:25:37 UTC 2009
root@i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
------------------------------------------------------------------------
[2009-10-25 16:00:18] mattwil@php.net
Are you cross-compiling for 32-bit, on a 64-bit system...?
------------------------------------------------------------------------
[2009-10-25 13:33:59] warren at guy dot net dot au
Description:
------------
json_decode truncates numbers greater than 32 bit int 2147483647 on 32
bit system
Reproduce code:
---------------
<?
$json_encoded =
'{"test_id_small_int":12345,"test_id_maxint":2147483647,"test_id_maxint_plus_two":2147483649,"test_id_huge_int":80000000000}';
var_dump(json_decode($json_encoded));
?>
Expected result:
----------------
object(stdClass)#1 (4) {
["test_id_small_int"]=>
int(12345)
["test_id_maxint"]=>
int(2147483647)
["test_id_maxint_plus_two"]=>
float(2147483649)
["test_id_huge_int"]=>
float(80000000000)
}
or even strings instead of floats would work for me.
Actual result:
--------------
object(stdClass)#1 (4) {
["test_id_small_int"]=>
int(12345)
["test_id_maxint"]=>
int(2147483647)
["test_id_maxint_plus_two"]=>
int(2147483647)
["test_id_huge_int"]=>
int(2147483647)
}
------------------------------------------------------------------------
--
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Thread (7 messages)