ID: 40802 User updated by: taco at procurios dot nl Reported By: taco at procurios dot nl Status: Bogus Bug Type: *Math Functions Operating System: Linux 2.6.17-11-386 PHP Version: 5.2.1 New Comment:
I agree that this is normal behaviour for floats, but the same bug appears when you would pass a string. Does number_format cast strings to floats internally? Previous Comments: ------------------------------------------------------------------------ [2007-03-14 10:09:47] [EMAIL PROTECTED] 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. ------------------------------------------------------------------------ [2007-03-14 10:07:19] taco at procurios dot nl Description: ------------ Since there is no way to tell number_format to use a specified decimal separator and thousands separator without rounding the number I wanted to set the amount of decimals bigger than the given amount of decimals to strip the trailing zeros afterwards. However, the string number_format returned did not only add zeros to the given number: $ php -v PHP 5.2.1-0.dotdeb.1 with Suhosin-Patch 0.9.6.2 (cli) (built: Feb 9 2007 04:46:32) Copyright (c) 1997-2007 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies $ php -r "echo number_format(2.333333, 60, ',', '.');" 2,333333000000000101437080957111902534961700439453125000000000 Reproduce code: --------------- echo number_format(2.333333, 60, ',', '.'); Expected result: ---------------- 2,333333000000000000000000000000000000000000000000000000000000 Actual result: -------------- 2,333333000000000101437080957111902534961700439453125000000000 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=40802&edit=1
