#45300 [Opn->Bgs]: Bug in number format
ID: 45300
Updated by: jani@php.net
Reported By: gernovich at ya dot ru
-Status: Open
+Status: Bogus
Bug Type: *General Issues
Operating System: win xp
PHP Version: 5.2.6
New Comment:
Floating point values have a limited precision. Hence a value might
not have the same string representation after any processing. That also
includes writing a floating point value in your script and directly
printing it without any mathematical operations.
If you would like to know more about "floats" and what IEEE
754 is, read this:
http://docs.sun.com/source/806-3568/ncg_goldberg.html
Thank you for your interest in PHP.
Previous Comments:
------------------------------------------------------------------------
[2008-06-18 12:50:03] gernovich at ya dot ru
Description:
------------
Convertion problem with float types.
The problem is also affected on round() and ceil(),
but number_format() not no mathematical function.
Reproduce code:
---------------
$a = -0.014;
print round($a,1)."\n"; // -0 bogus
print number_format($a, 1)."\n"; // -0.0 bug
Expected result:
----------------
-0
0.0
Actual result:
--------------
-0
-0.0
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=45300&edit=1
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