#31512 [NEW]: wrong expression execution order

From: dan at yes dot lt Operating system: any PHP version: 4.3.10 PHP Bug Type: *General Issues Bug description: wrong expression execution order Description: ------------ Arithmetic expression execution returns unexpected results with ++ or -- operators. Reproduce code: --------------- $a = 10; $c = $a++ + ++$a; echo "$c\n"; $a = 10; $c = ++$a + $a++; echo "$c\n"; Expected result: ---------------- 22 22 Actual result: -------------- 22 23 <- ?? Why ?? -- Edit bug report at http://bugs.php.net/?id=31512&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31512&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=31512&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=31512&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=31512&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=31512&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=31512&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=31512&r=needscript Try newer version: http://bugs.php.net/fix.php?id=31512&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=31512&r=support Expected behavior: http://bugs.php.net/fix.php?id=31512&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=31512&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=31512&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=31512&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31512&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=31512&r=dst IIS Stability: http://bugs.php.net/fix.php?id=31512&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=31512&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=31512&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=31512&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=31512&r=mysqlcfg