#34967 [NEW]: $y=1.3+0.1>1.4
| From: | davidyht516 at hotmail dot com | Date: | Mon, 24 Oct 2005 10:53:02 +0000 |
| Subject: | #34967 [NEW]: $y=1.3+0.1>1.4 | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-86973@lists.php.net to get a copy of this message | ||
From: davidyht516 at hotmail dot com
Operating system: windows xp home
PHP version: 5.0.5
PHP Bug Type: Math related
Bug description: $y=1.3+0.1>1.4
Description:
------------
The erro is: 1.3+0.1>1.4
Reproduce code:
---------------
$y=1.3+0.1;
if($y==1.4){$y-=1.4; echo "yes y-1.4=$y";}
else{$y-=1.4; echo "no y-1.4=$y";}
Expected result:
----------------
The result of the code should be:
yes y-1.4=0
Actual result:
--------------
Actual result is:
no y-1.4=2.2e-12
It happens only when $y=1.3+0.1;
If changing the code to $y=1.2+0.2; then the result is correct.
What is going on here?
--
Edit bug report at http://bugs.php.net/?id=34967&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=34967&r=trysnapshot4
Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=34967&r=trysnapshot50
Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=34967&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=34967&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=34967&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=34967&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=34967&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=34967&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=34967&r=support
Expected behavior: http://bugs.php.net/fix.php?id=34967&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=34967&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=34967&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=34967&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=34967&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=34967&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=34967&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=34967&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=34967&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=34967&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=34967&r=mysqlcfg