Bug #69866 [NEW]: usort call with same keys problem

From: dmifedorenko at gmail dot com Operating system: Linux vm 3.13.0-37-generic #64-U PHP version: 7.0Git-2015-06-18 (Git) Package: Arrays related Bug Type: Bug Bug description:usort call with same keys problem Description: ------------ Different usort behavior in php5.6 and php7. 5.6 returns first array element, and 7 returns last element. Test script: --------------- $results = array( array(2001, 1), array(2002, 1), ); usort($results, function ($a, $b) { return $a[1] > $b[1] ? -1 : 1; }); var_dump($results[0][0]); Expected result: ---------------- int(2001) Actual result: -------------- int(2002) -- Edit bug report at https://bugs.php.net/bug.php?id=69866&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=69866&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=69866&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=69866&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=69866&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=69866&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=69866&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=69866&r=needscript Try newer version: https://bugs.php.net/fix.php?id=69866&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=69866&r=support Expected behavior: https://bugs.php.net/fix.php?id=69866&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=69866&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=69866&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=69866&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=69866&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=69866&r=dst IIS Stability: https://bugs.php.net/fix.php?id=69866&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=69866&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=69866&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=69866&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=69866&r=mysqlcfg