From: me at lucasoman dot com Operating system: Fedora Core 3 PHP version: 4.4.0 PHP Bug Type: Math related Bug description: modulus operator truncates decimal operands
Description: ------------ This issue has been brought up before, but not in so many words. The modulus operator (%) truncates float operands and always returns an integer result. Some languages behave similarly, some do not. Java, for one, correctly performs the float calculation. I see no reason--besides ease of coding or perhaps for the sake of efficient code--that such an arbitrary limitation would be placed on a general mathematical operator. Some limitations, like disallowing division by zero, are not arbitrary; these are required mathematically. However, restricting modulus to integer operands is not mathematically logical. You may make the suggestion that I write my own float modulus function that performs recursive subtractions. However, if your reason for coding mod as an integer operator is efficiency, writing <i>script</i> code to perform this calculation--especially on large numbers--is most certainly not more efficient. I (humbly) request that you reconsider the way you've coded the mod operator. Reproduce code: --------------- print(4.5 % 2); Expected result: ---------------- .5 Actual result: -------------- 0 -- Edit bug report at http://bugs.php.net/?id=34399&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=34399&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=34399&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=34399&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=34399&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=34399&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=34399&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=34399&r=needscript Try newer version: http://bugs.php.net/fix.php?id=34399&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=34399&r=support Expected behavior: http://bugs.php.net/fix.php?id=34399&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=34399&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=34399&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=34399&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=34399&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=34399&r=dst IIS Stability: http://bugs.php.net/fix.php?id=34399&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=34399&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=34399&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=34399&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=34399&r=mysqlcfg
