#49747 [Opn->Bgs]: floor() issue

ID: 49747 Updated by: sjoerd@php.net Reported By: rajiv dot ambegaokar at oracle dot com -Status: Open +Status: Bogus Bug Type: Math related Operating System: Windows XP PHP Version: 5.2.11 New Comment: Floating point values have a limited precision. Hence a value might not have the same string representation after any processing. That also includes writing a floating point value in your script and directly printing it without any mathematical operations. If you would like to know more about "floats" and what IEEE 754 is, read this: http://docs.sun.com/source/806-3568/ncg_goldberg.html Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2009-10-02 10:27:37] rajiv dot ambegaokar at oracle dot com Description: ------------ Floor function not working properly. Reproduce code: --------------- <?php $a = 43.1234 ; $a = floor($a * 10000); echo $a; ?> Expected result: ---------------- 431234 Actual result: -------------- 431233 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=49747&edit=1