ID: 41338 Updated by: [EMAIL PROTECTED] Reported By: kjarli at gmail dot com -Status: Open +Status: Bogus Bug Type: Math related Operating System: Windows vista PHP Version: 5.2.2 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: ------------------------------------------------------------------------ [2007-05-09 09:10:26] kjarli at gmail dot com Description: ------------ when creating formulas, i encountered a strange bug: this is the basic forumula: ceil(user_hp * 1.1) when user_hp = 100 you get the following formula ceil(100*(110/100)) in my script. this will result 111 instead of 110 Reproduce code: --------------- <?php $lol1 = ceil(100 * (110 / 100)); $lol2 = ceil(100 * 1.1); $lol3 = ceil(110); $lol4 = ceil(110.0); echo $lol1; ?> <br /> <?php echo $lol2; ?> <br /> <?php echo $lol3; ?> <br /> <?php echo $lol4; ?> Expected result: ---------------- 110 110 110 110 Actual result: -------------- 111 111 110 110 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=41338&edit=1
