Bug #51397 [Com]: Math calculation bug
Edit report at http://bugs.php.net/bug.php?id=51397&edit=1
ID: 51397
Comment by: whatrevolution at yahoo dot com
Reported by: emanuel dot dejanu at humaninfo dot ro
Summary: Math calculation bug
Status: Verified
Type: Bug
Package: Scripting Engine problem
Operating System: FREEBSD & LINUX
PHP Version: 5.2.13
New Comment:
My answer to myhash('CL6.1.7'): 229416432419738
PHP Version 5.2.10-2ubuntu6.4
System Linux 2.6.31-20-generic x86_64
Build Date Jan 6 2010 22:36:47
Server API Apache 2.0 Handler
PHP API 20041225
PHP Extension 20060613
Zend Extension 220060519
Debug Build no
Thread Safety disabled
Zend Memory Manager enabled
Apache/2.2.12 (Ubuntu)
Previous Comments:
------------------------------------------------------------------------
[2010-03-26 11:56:42] fa@php.net
Verified with 5.2.13 on Debian (default configure)
Verified in the Debian 5.2.6+lenny4 PHP (just for completeness)
Correct result with 5.3.2 on Gentoo
------------------------------------------------------------------------
[2010-03-26 08:20:19] emanuel dot dejanu at humaninfo dot ro
Description:
------------
I have used the code from the test script on my development machine
(Windows Professional 7 32bit) with php 5.2.12 and is working correctly
but when I have deployed on my production machine that is FreeBSD 6.3
32bit with the same php version 5.2.12 is giving wrong results
(-2147483593). I also run this on other production machine that is
RedHat 5 32bit with php 5.2.6 and is also giving wrong results
(-2147483593).
I can not test with php 5.2.13 on production machines (virtual
hosting).
On windows is giving the correctly result (754303898) with PHP 5.2.12
and PHP 5.3.1. I am running in 32bit platform on all machines.
-------------------------------------------------------------------
PHP_INT_SIZE: 4
System => FreeBSD somehost.com 6.3-RELEASE FreeBSD 6.3-RELEASE #6: Wed
Oc
t 21 09:32:42 MDT 2009 root@fc:/usr/src/sys/i386/compile/VKERN i386
Build Date => Mar 3 2010 12:51:00
Configure Command => './configure' '--with-layout=GNU'
'--with-config-file-sca
n-dir=/usr/local/etc/php' '--disable-all' '--enable-libxml'
'--with-libxml-dir=/
usr/local' '--enable-reflection' '--program-prefix='
'--enable-fastcgi'
'--with-
apxs2=/usr/local/sbin/apxs' '--with-regex=php' '--with-zend-vm=CALL'
'--prefix=/
usr/local' '--mandir=/usr/local/man' '--infodir=/usr/local/info/'
'--build=i386-
portbld-freebsd6.3'
Server API => Command Line Interface
Virtual Directory Support => disabled
Configuration File (php.ini) Path => /usr/local/etc
Loaded Configuration File => /usr/local/etc/php.ini
Scan this dir for additional .ini files => /usr/local/etc/php
additional .ini files parsed => /usr/local/etc/php/extensions.ini
PHP API => 20041225
PHP Extension => 20060613
Zend Extension => 220060519
Debug Build => no
Test script:
---------------
function myhash($key) {
$h = 5381;
$l = strlen($key);
for($i = 0; $i < $l; ++$i) {
$h = (($h << 5) + $h) ^ ord($key[$i]);
}
return $h;
}
$h = myhash('CL6.1.7');
if ($h != 754303898)
echo "bug\n";
echo $h . "\n";
Expected result:
----------------
754303898
Actual result:
--------------
bug
-2147483593
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=51397&edit=1
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