#39689 [Opn->Bgs]: PHP converts float to integer incorrectly

ID: 39689 Updated by: tony2001@php.net Reported By: toomuchphp-phpbugs at yahoo dot com -Status: Open +Status: Bogus Bug Type: Math related Operating System: Mac OS X PHP Version: 5.2.0 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: ------------------------------------------------------------------------ [2006-11-30 07:10:09] toomuchphp-phpbugs at yahoo dot com Description: ------------ PHP converts some floats to integers incorrectly (I only know of one example). Reproduce code: --------------- <?php echo strval(2169.99 * 100), "\n"; echo intval(2169.99 * 100), "\n"; // converts incorrectly Expected result: ---------------- 216999 216999 Actual result: -------------- 216999 216998 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=39689&edit=1