php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #73738 json_encode Digital precision problems
Submitted: 2016-12-14 14:07 UTC Modified: 2017-02-12 04:22 UTC
Votes:14
Avg. Score:4.4 ± 1.2
Reproduced:11 of 13 (84.6%)
Same Version:10 (90.9%)
Same OS:10 (90.9%)
From: chenjiablog at gmail dot com Assigned:
Status: No Feedback Package: json (PECL)
PHP Version: 7.1.0 OS: all
Private report: No CVE-ID: None
View Add Comment Developer Edit
Anyone can comment on a bug. Have a simpler test case? Does it work for you on a different platform? Let us know!
Just going to say 'Me too!'? Don't clutter the database with that please — but make sure to vote on the bug!
Your email address:
MUST BE VALID
Solve the problem:
7 + 35 = ?
Subscribe to this entry?

 
 [2016-12-14 14:07 UTC] chenjiablog at gmail dot com 
Description:
------------
When using this function to deal with an array containing decimal, there will be precision problems.

Test script:
---------------
<?php
$array['a'] = "as";
$array['b'] = 1;
$array['c'] = 1.13;
$array['d'] = 10.08;
echo json_encode($array);

Expected result:
----------------
{"a":"as","b":1,"c":1.13,"d":10.08}

Actual result:
--------------
{"a":"as","b":1,"c":1.1299999999999999,"d":10.08}

Patches

Add a Patch

Pull Requests

Add a Pull Request

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2017-01-30 16:42 UTC] jhdxr@php.net
-Status: Open +Status: Feedback
 [2017-01-30 16:42 UTC] jhdxr@php.net 
this issue cannot be reproduced with your test script, see <https://3v4l.org/42HIs>
 [2017-02-01 06:03 UTC] sergey at lutskanu dot ru 
jhdxr@php.net, I confirm that this problem exists and reproduced both in 7.1.0 and 7.1.1.
About your example I think it can be specific behaviour on 3v4l.org.

To reproduce issue you can try it from CLI for example:

# cat test.php
<?php
$array['a'] = "as";
$array['b'] = 1;
$array['c'] = 1.13;
$array['d'] = 10.08;
echo json_encode($array);

# php -v
PHP 7.1.1 (cli) (built: Jan 18 2017 11:37:34) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.1.1, Copyright (c) 1999-2017, by Zend Technologies

# php test.php
{"a":"as","b":1,"c":1.1299999999999999,"d":10.08}
 [2017-02-12 04:22 UTC] pecl-dev at lists dot php dot net 
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Fri Apr 26 01:01:30 2024 UTC