Bug #80286 [NEW]: Math operation with precision in php.ini

From: is dot malozemov at ya dot ru Operating system: Linux Ubuntu 20.04 LTS PHP version: 7.3.23 Package: *Math Functions Bug Type: Bug Bug description:Math operation with precision in php.ini Description: ------------ Math operations ignores precision option in php.ini (php 7+); Precision is works for PHP 5. Test script: --------------- <?php $precision = 18; while($precision--) { ini_set('precision', $precision); echo $precision.":".(342349.23 - 341765.07)."\n"; } Expected result: ---------------- 17:584.15999999997439 16:584.1599999999744 15:584.159999999974 14:584.15999999997 13:584.16 12:584.16 11:584.16 10:584.16 9:584.16 8:584.16 7:584.16 6:584.16 5:584.16 4:584.2 3:584 2:5.8E+2 1:6.0E+2 0:6.0E+2 Actual result: -------------- 17:5.8E+2 16:5.8E+2 15:5.8E+2 14:5.8E+2 13:5.8E+2 12:5.8E+2 11:5.8E+2 10:5.8E+2 9:5.8E+2 8:5.8E+2 7:5.8E+2 6:5.8E+2 5:5.8E+2 4:5.8E+2 3:5.8E+2 2:5.8E+2 1:5.8E+2 0:5.8E+2 -- Edit bug report at https://bugs.php.net/bug.php?id=80286&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80286&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80286&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80286&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80286&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80286&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80286&r=support Expected behavior: https://bugs.php.net/fix.php?id=80286&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80286&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80286&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80286&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80286&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80286&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80286&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80286&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80286&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80286&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80286&r=mysqlcfg