Edit report at https://bugs.php.net/bug.php?id=71136&edit=1
ID: 71136
Updated by: laruence@php.net
Reported by: djbrainnrg at gmail dot com
Summary: periodic float numbers bug, works in php 5.6
Status: Open
Type: Bug
Package: Unknown/Other Function
Operating System: Windows10 64bit / Apache 2.4.x
PHP Version: 7.0.0
Block user comment: N
Private report: N
New Comment:
seems all php versions behavior same: https://3v4l.org/BrWp6
Previous Comments:
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[2015-12-16 14:56:56] djbrainnrg at gmail dot com
Description:
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Floating number precision in PHP 7 seems to be buggy or at least different to PHP 5.6.
A simple calculation with a periodic number see testscript.
This happens not with all periodic numbers.
In PHP 5.6.x this works fine and output "8.2" as expected.
In PHP 7.x this does NOT work and always output "8.199999999999", doesn't matter if
you use round() with precision or not.
Test script:
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ini_set("precision", (PHP_INT_SIZE == 4) ? 14 : 16);
$nr = 8 + (1/10) + (9/90);
var_dump($nr, round($nr, 2));
Expected result:
----------------
"8.2" for the rounded result on all systems.
Actual result:
--------------
"8.1999999999999" also with round() called
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Edit this bug report at https://bugs.php.net/bug.php?id=71136&edit=1