Edit report at http://bugs.php.net/bug.php?id=54414&edit=1
ID: 54414 Updated by: [email protected] Reported by: ejsexton82 at gmail dot com Summary: Floating-Point Arithmetic Bug -Status: Open +Status: Bogus Type: Bug Package: Math related Operating System: Windows Server 2003 PHP Version: 5.3.6 Block user comment: N Private report: N 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://www.floating-point-gui.de/ Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2011-03-28 20:57:06] ejsexton82 at gmail dot com Description: ------------ The following calculation yields an unexpected result. Test script: --------------- $test = 625.0 - 661.7 + 37.0; var_dump($test); Expected result: ---------------- 0.3 Actual result: -------------- 0.29999999999995 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54414&edit=1
