Bug #68200 [Com]: json_decode rounding floats to 3 digits precision

From: Date: Thu, 09 Oct 2014 14:22:21 +0000
Subject: Bug #68200 [Com]: json_decode rounding floats to 3 digits precision
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-187987@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=68200&edit=1

 ID:                 68200
 Comment by:         marcin at urzenia dot net
 Reported by:        vwirus at o2 dot pl
 Summary:            json_decode rounding floats to 3 digits precision
 Status:             Open
 Type:               Bug
 Package:            JSON related
 Operating System:   linux/debian
 PHP Version:        5.5.17
 Block user comment: N
 Private report:     N

 New Comment:

It's float problem, not JSON:

var_dump((float)"1000000.66599998") => float(1000000.666)


Previous Comments:
------------------------------------------------------------------------
[2014-10-09 14:00:18] vwirus at o2 dot pl

Description:
------------
json_decode rounding floats to 3 digits precision. My precision setting in php.ini shows 14.


Test script:
---------------
$tmp = json_decode('{"number":1000000.66599998}', true);
        if (false !== strpos((string) $tmp['number'], '1000000.666')) {
            echo PHP_EOL, 'WRONG', PHP_EOL;
        }
        else {
            echo PHP_EOL, 'OK', PHP_EOL;
        }
        var_dump($tmp, $tmp['number']);

Expected result:
----------------
After decode the value of $tmp['number'] should be 1000000.66599998.

Actual result:
--------------
After decode the value of $tmp['number'] shows be 1000000.666 (it rounds real value with 3
digits precision)


------------------------------------------------------------------------



--
Edit this bug report at https://bugs.php.net/bug.php?id=68200&edit=1

Thread (8 messages)

« previous php.bugs (#187987) next »