Doc #66288 [NEW]: pow() gives unexpected results if exponent is negative

From: mattT1227 at gmail dot com Operating system: PHP version: 5.5.7 Package: *General Issues Bug Type: Documentation Problem Bug description:pow() gives unexpected results if exponent is negative Description: ------------ --- From manual page: http://www.php.net/function.pow --- At least show example that negative exponents are not correctly implemented by pow. Note, reporting system shows this problem has been suspended. It is still a problem. Test script: --------------- echo pow(4, -2); // should be same as square root of 4 -- Edit bug report at https://bugs.php.net/bug.php?id=66288&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=66288&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=66288&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=66288&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=66288&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=66288&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=66288&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=66288&r=needscript Try newer version: https://bugs.php.net/fix.php?id=66288&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=66288&r=support Expected behavior: https://bugs.php.net/fix.php?id=66288&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=66288&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=66288&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=66288&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=66288&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=66288&r=dst IIS Stability: https://bugs.php.net/fix.php?id=66288&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=66288&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=66288&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=66288&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=66288&r=mysqlcfg