#42835 [NEW]: Multiplication Problem
| From: | konrad at fumaco dot com | Date: | Wed, 03 Oct 2007 05:54:24 +0000 |
| Subject: | #42835 [NEW]: Multiplication Problem | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-118118@lists.php.net to get a copy of this message | ||
From: konrad at fumaco dot com
Operating system: Windows
PHP version: 5.2.4
PHP Bug Type: Math related
Bug description: Multiplication Problem
Description:
------------
$t is supposed to return 0. However, for some reason $x is not the same as
$v.
The problem only occurs with this number.
Reproduce code:
---------------
$x = (5.10 * 200);
$v = 1020;
$t = $x - $v;
echo "x = ".$x ."<br>";
echo "v = ".$v ."<br>";
echo "t = ".$t ."<br>";
if($x==$v){
echo "yes";
} else {
echo "no";
}
Expected result:
----------------
x = 1020
v = 1020
t = 0
yes
Actual result:
--------------
x = 1020
v = 1020
t = -1.1368683772162E-13
no
--
Edit bug report at http://bugs.php.net/?id=42835&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42835&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42835&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42835&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42835&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=42835&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42835&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42835&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42835&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42835&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42835&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=42835&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=42835&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42835&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42835&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42835&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42835&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42835&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42835&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42835&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42835&r=mysqlcfg