From: k1ngrs at ntlworld dot com Operating system: Windows XP Pro SP2 PHP version: 5.2.9 PHP Bug Type: BC math related Bug description: Bcmath precision issue
Description: ------------ The bcmath commands do not seem to work for numbers smaller than 0.0001 for exmaple if you add 0.00001 and 0.00001 the result is zero. Even setting the bcscale beforehand does not fix the issue. Reproduce code: --------------- <?php $a =bcadd(0.00011,0.00011,6); $b =bcadd(0.00001,0.00001,6); $c =bcsub((double)0.00001,(double)0.000005,6); echo "1. 0.00011 + 0.00011 = $a OK\r\n"; echo "2. 0.00001 + 0.00001 = $b Wrong\r\n"; echo "3. 0.00001 - 0.000005 = $c Wrong\r\n"; ?> Expected result: ---------------- 1. 0.00011 + 0.00011 = 0.000220 2. 0.00001 + 0.00001 = 0.00002 3. 0.00001 - 0.000005 = 0.000005 Actual result: -------------- 1. 0.00011 + 0.00011 = 0.000220 OK 2. 0.00001 + 0.00001 = 0.000000 Wrong 3. 0.00001 - 0.000005 = 0.000000 Wrong -- Edit bug report at http://bugs.php.net/?id=47633&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=47633&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=47633&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=47633&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=47633&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47633&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=47633&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=47633&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=47633&r=needscript Try newer version: http://bugs.php.net/fix.php?id=47633&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=47633&r=support Expected behavior: http://bugs.php.net/fix.php?id=47633&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=47633&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=47633&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=47633&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47633&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=47633&r=dst IIS Stability: http://bugs.php.net/fix.php?id=47633&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=47633&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=47633&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=47633&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=47633&r=mysqlcfg
