Bug #12155 Updated: modulus %

ID: 12155 Updated by: phil.cavazos@salemhospital.org Reported By: yaragn@hotmail.com Status: Bogus Bug Type: Math related Operating System: linux 2.4.3 PHP Version: 4.0.5 New Comment: The modulus operator seems to also fail with negative integers. The operation -1%7 should return 6 but instead returns -1 on negative numbers it simply returns the divisor Previous Comments: ------------------------------------------------------------------------ [2001-08-07 12:47:33] jmcastagnetto@php.net See Bug #12623 for a more complete explanation on modulus ( http://www.php.net/bugs.php?id=12623 ) ------------------------------------------------------------------------ [2001-08-06 19:57:53] jeroen@php.net float % int could lead to rounding difficulties, which is not a bug. ------------------------------------------------------------------------ [2001-07-13 20:34:11] yaragn@hotmail.com Integer limited to 2047000000 so there. ------------------------------------------------------------------------ [2001-07-13 18:29:23] yaragn@hotmail.com Appears to be broken on large(r) integers. Is this a limitation on the type used? (I am coding working ip2long/long2ip). $temp = 3194548456; print "correct: " . ($temp - 255*floor($temp/255)); print "php: " . $temp % 255 . "<br>"; as defined in maths, the % is equiv to MOD(n, d) = n - d*INT(n/d) where n is the number, d is the divisor. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=12155&edit=1