php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #45117 strval gives :.0E-7 for 1e-6
Submitted: 2008-05-28 13:24 UTC Modified: 2008-07-23 14:10 UTC
Votes:2
Avg. Score:3.0 ± 2.0
Reproduced:1 of 2 (50.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: rudolphi at chemie dot uni-kl dot de Assigned: fb-req-jani (profile)
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.2.6 OS: Ubuntu 8.04 (32bit)
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: rudolphi at chemie dot uni-kl dot de
New email:
PHP Version: OS:

 

 [2008-05-28 13:24 UTC] rudolphi at chemie dot uni-kl dot de 
Description:
------------
When converting a number in exponential format with negative exponent of n=6,7,... strval (or implicit conversion to string) gives :.0E-(n+1) if there is no fractional part present. The error can be found both in the precompiled PHP 5.2.4 and self-compiled 5.2.6, but it cannot be reproduced under Windows or under PHP 5.2.3 Ubuntu 7.10 (64bit). Seems to be closely related to OS (?).

Reproduce code:
---------------
$float=1e-6;
echo strval($float);

Expected result:
----------------
1e-6 or 1.0e-6

Actual result:
--------------
:.0E-7

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2008-07-15 21:11 UTC] jani@php.net 
I can not reproduce this, check this out:

# uname -a
Linux linux5 2.6.20-1.2944.fc6 #1 SMP Tue Apr 10 17:46:00 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
# php -n -r '$float=1e-6; var_dump($float, strval($float));'
float(1.0E-6)
string(6) "1.0E-6"
# php -v
$ php -v
PHP 5.2.7-dev (cli) (built: Jul 15 2008 04:32:33)
..

Can you post the same here?
 [2008-07-15 22:17 UTC] rudolphi at chemie dot uni-kl dot de 
$ uname -a
Linux rudolphi 2.6.24-19-generic #1 SMP Wed Jun 18 14:43:41 UTC 2008 i686 GNU/Linux
$ php -n -r '$float=1e-6; var_dump($float, strval($float));'
float(:.0E-7)
string(6) ":.0E-7"
$ php -v
PHP 5.2.6 (cli) (built: May 29 2008 10:18:45) 
Copyright (c) 1997-2008 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies
 [2008-07-16 10:00 UTC] jani@php.net 
I can't reproduce in 32bit linux either:

$ uname -a
Linux localhost.localdomain 2.6.25.9-76.fc9.i686 #1 SMP Fri Jun 27 16:14:35 EDT 2008 i686 i686 i386 GNU/Linux
[jani@localhost ~]$ src/build/php_5_2/sapi/cli/php  -n -r '$float=1e-6; var_dump($float, strval($float));'
float(1.0E-6)
string(6) "1.0E-6"
 [2008-07-16 10:10 UTC] jani@php.net 
I tried with non-debug build too and still can't reproduce.
What GCC version do you use..? Glibc?
 [2008-07-16 13:23 UTC] rudolphi at chemie dot uni-kl dot de 
My GCC-Version is 4.2.3-1ubuntu6, libgcc1 is 4.2.3-2ubuntu7 and my libc6 is 2.7-10ubuntu3 (the up-to-date-versions of Hardy Heron). Thanks a lot for your efforts in this topic. I have just recompiled PHP 5.2.6 (and restarted apache) to reproduce the error with the very versions mentioned above. The error is still there.
 [2008-07-16 19:18 UTC] jani@php.net 
Are you able to reproduce this on some other machine? Or some other *nix / linux distro? Or does it only happen with on one single machine and OS?
 [2008-07-17 15:02 UTC] rudolphi at chemie dot uni-kl dot de 
The error can be reproduced on two different machines:
- my development machine (Core Duo 2300, 1GB) and
- the production machine (Core 2 Quad 9450, 2GB),
both running the 32bit version of Ubuntu 8.04 (including all updates, but no "proposed","backports" stuff)

I cannot reproduce the error on 
- another testing machine (Core 2 Duo 6550, 2GB) running Ubuntu 7.10 64bit
- a Windows 2003 Server
- a Win XP Professional running Xampp

I will try with some *nix-live cds and post the results very soon.
 [2008-07-17 16:02 UTC] rudolphi at chemie dot uni-kl dot de 
On openSUSE 11, the problem cannot be reproduced either. Though, changing everything to openSUSE is not an option for me, sorry (usability is a nightmare). Isn't there any Ubuntu user out there who can reproduce this?
 [2008-07-20 11:16 UTC] jani@php.net 
What gcc version that openSuSE has? Try this on the ubuntus: 

Using fresh, just untarred/gunzipped php sources:

# ./configure --disable-all --disable-cgi --enable-debug
# make
# php -n -r '$float=1e-6; var_dump($float, strval($float));'
 [2008-07-23 08:30 UTC] lmalgras at tennaxia dot com 
It seems to be the same issue as reported on #43487
 [2008-07-23 08:59 UTC] rudolphi at chemie dot uni-kl dot de 
Yes, I have just read #43487, and this seems to be my problem. I wonder why I did not find that one when searching for related information. Sorry, and thank you all for your help!!
 [2008-07-23 14:10 UTC] jani@php.net 
Bogusing this since bug #43487 has lot more information.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Mon Dec 01 01:00:01 2025 UTC