Bug #54164 [Opn->Bgs]: Wrong Output Values

Edit report at http://bugs.php.net/bug.php?id=54164&edit=1 ID: 54164 Updated by: rasmus@php.net Reported by: eskolife at hotmail dot com Summary: Wrong Output Values -Status: Open +Status: Bogus Type: Bug Package: *General Issues Operating System: Windows XP SP3 PHP Version: 5.3.5 Block user comment: N Private report: N New Comment: Truncating floating point values is always dangerous because computers do not store floating point values precisely, so when you do floor(4.999999999999999) you are going to get 4, not 5. Use round() instead. You can read more about it here: http://en.wikipedia.org/wiki/IEEE_754-2008 Previous Comments: ------------------------------------------------------------------------ [2011-03-04 23:17:58] eskolife at hotmail dot com Description: ------------ $Val = cos(deg2rad(60)); $Val = $Val * 10; echo $Val.'---'.intval($Val).'<br>'; echo $Val.'---'.floor($Val); then the output of this simple code should be: 5---5 5---5 but the real output is: 5---4 5---4 Test script: --------------- <?php $Val = cos(deg2rad(60)); $Val = $Val * 10; echo $Val.'---'.intval($Val).'<br>'; echo $Val.'---'.floor($Val); ?> Expected result: ---------------- 5---5 5---5 Actual result: -------------- 5---4 5---4 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54164&edit=1