#47304 [Opn->Fbk]: typecast of numeric string to float produces strange result
| From: | jani@php.net | Date: | Thu, 05 Feb 2009 14:12:08 +0000 |
| Subject: | #47304 [Opn->Fbk]: typecast of numeric string to float produces strange result | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-133531@lists.php.net to get a copy of this message | ||
ID: 47304
Updated by: jani@php.net
Reported By: lennartvdd at mailordersolutions dot nl
-Status: Open
+Status: Feedback
Bug Type: Scripting Engine problem
Operating System: Server 2003 for SBS SP2 - IIS
PHP Version: 5.2.8
New Comment:
Eh? How come it worked once but not after that? Can you reproduce this
with totally different machine? (works fine still for me on all machines
I have, and I have quite a few..)
Previous Comments:
------------------------------------------------------------------------
[2009-02-05 11:34:19] lennartvdd at mailordersolutions dot nl
For some strange reason the problem is reoccurring again with version
5.2.9-dev!
Reproduce code:
---------------
echo "PHP version: " . PHP_VERSION . "\n";
$var = (float)"-39.000";
var_dump($var);
$var = (float)"39.000";
var_dump($var);
$var = (float)"17.000";
var_dump($var);
$var = (float)"-17.000";
var_dump($var);
$var = "-39.000" + 0;
var_dump($var);
$var = "39.000" + 0;
var_dump($var);
$var = "17.000" + 0;
var_dump($var);
$var = "-17.000" + 0;
var_dump($var);
Actual result:
--------------
PHP version: 5.2.9-dev
float(-38.:)
float(38.:)
float(16.:)
float(-16.:)
float(-38.:)
float(38.:)
float(16.:)
float(-16.:)
------------------------------------------------------------------------
[2009-02-05 09:12:01] lennartvdd at mailordersolutions dot nl
I installed the latest version like you recommended (PHP version:
5.2.9-dev (win32 x86 VC6)). That fixed it.
------------------------------------------------------------------------
[2009-02-04 22:22:23] jani@php.net
Forgot this, output on my linux server using PHP 5.2.8:
float(-39)
float(39)
float(17)
float(-17)
float(-39)
float(39)
float(17)
float(-17)
------------------------------------------------------------------------
[2009-02-04 22:21:37] jani@php.net
Please try using this CVS snapshot:
http://snaps.php.net/php5.2-latest.tar.gz
For Windows:
http://windows.php.net/snapshots/
------------------------------------------------------------------------
[2009-02-04 12:41:54] lennartvdd at mailordersolutions dot nl
Description:
------------
Typecasting or converting some numeric strings variables to a float
value does not work as expected.
Reproduce code:
---------------
$var = (float)"-39.000";
var_dump($var);
$var = (float)"39.000";
var_dump($var);
$var = (float)"17.000";
var_dump($var);
$var = (float)"-17.000";
var_dump($var);
$var = "-39.000" + 0;
var_dump($var);
$var = "39.000" + 0;
var_dump($var);
$var = "17.000" + 0;
var_dump($var);
$var = "-17.000" + 0;
var_dump($var);
Expected result:
----------------
float(-39)
float(39)
float(17)
float(-17)
float(-39)
float(39)
float(17)
float(-17)
Actual result:
--------------
float(-38.:)
float(38.:)
float(16.:)
float(-16.:)
float(-38.:)
float(38.:)
float(16.:)
float(-16.:)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=47304&edit=1