#47304 [NoF->Fbk]: typecast of numeric string to float produces strange result

From: Date: Fri, 20 Mar 2009 15:58:36 +0000
Subject: #47304 [NoF->Fbk]: typecast of numeric string to float produces strange result
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-134937@lists.php.net to get a copy of this message 
 ID:               47304
 Updated by:       pajoye@php.net
 Reported By:      lennartvdd at mailordersolutions dot nl
-Status:           No Feedback
+Status:           Feedback
 Bug Type:         Scripting Engine problem
 Operating System: Server 2003 for SBS SP2 - IIS
 PHP Version:      5.2.8
-Assigned To:      
+Assigned To:      pajoye
 New Comment:

What is the last version working correctly?


Previous Comments:
------------------------------------------------------------------------

[2009-02-13 01:00:01] php-bugs at lists dot php dot net

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".

------------------------------------------------------------------------

[2009-02-05 14:24:34] lennartvdd at mailordersolutions dot nl

Yeah weird huh?! I changed back to PHP version: 5.2.0. Float conversion
works fine again now!

I'll try it on some different machines, but I won't have time to do
that until next week, so you'll hear more from me then.

------------------------------------------------------------------------

[2009-02-05 14:12:07] jani@php.net

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..)

------------------------------------------------------------------------

[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.

------------------------------------------------------------------------

The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
    http://bugs.php.net/47304

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