Edit report at https://bugs.php.net/bug.php?id=69188&edit=1
ID: 69188
Comment by: fisharebest at gmail dot com
Reported by: manuel at moosnet dot de
Summary: The constant INF is set to float(0)
Status: Open
Type: Bug
Package: Math related
Operating System: SunOS 5.10
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
One of users (also a strato.de customer) has reported the same issue, across a range of PHP
versions.
I have just built a SunOS 11.2 server and compiled PHP from source.
It works as expected.
This suggests the problem is specific to servers at strato.de.
Previous Comments:
------------------------------------------------------------------------
[2015-03-04 21:14:33] manuel at moosnet dot de
Description:
------------
First, sorry, this is on a shared hoster (strato.de) environment and I do not have full control over
the PHP version that is used; I cannot use anything current, only a variety of older versions.
Essentially, the bug is that INF is exactly equal to 0 on SunOS 5.10. NAN seems to work fine. No
string conversion is involved as far as I can tell.
The CPU seems to be a generic x86 and Python treats INF and NAN correctly, so it seems the FPU is
not the culprit.
The only mention of this behavior I found elsewhere is this old stackoverflow question:
http://stackoverflow.com/questions/11667512/php-inf-has-value-zero
Here's the output of a couple of test runs of the test script:
>>> uname -a
SunOS aklathep 5.10 Generic_142901-13 i86pc i386 i86pc
>>> php52 inftest.php
X-Powered-By: PHP/5.2.17
Content-type: text/html
float(0)
float(NAN)
>>> php53 inftest.php
X-Powered-By: PHP/5.3.29
Content-type: text/html
float(0)
float(NAN)
>>> php55 inftest.php
X-Powered-By: PHP/5.5.18
Content-type: text/html
float(0)
float(NAN)
>>> php56 inftest.php
X-Powered-By: PHP/5.6.2
Content-type: text/html; charset=iso-8859-1
float(0)
float(NAN)
Full version information:
>>> php52 --version
PHP 5.2.17 (cgi-fcgi) (built: Jul 30 2014 15:57:46)
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
>>> php53 --version
PHP 5.3.29 (cgi-fcgi) (built: Aug 20 2014 15:52:05)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2014 Zend Technologies
>>> php55 --version
PHP 5.5.18 (cgi-fcgi) (built: Oct 17 2014 12:36:29)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies
>>> php56 --version
PHP 5.6.2 (cgi-fcgi) (built: Oct 16 2014 13:30:19)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies
Test script:
---------------
<?php
$v = INF;
var_dump($v);
$v = NAN;
var_dump($v);
Expected result:
----------------
float(INF)
float(NAN)
Actual result:
--------------
float(0)
float(NAN)
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=69188&edit=1