Bug #75209 [NEW]: Bug in ??

From: ynijar at hotmail dot com Operating system: Windows/Linux PHP version: 7.0.23 Package: *General Issues Bug Type: Bug Bug description:Bug in ?? Description: ------------ $hash = null; $hash ?? 'test'; // output 'test' $hash = ''; $hash ?? 'test'; // output '' - WHY???? $hash = ""; !$hash ? 'test' : $hash; // output 'test' Test script: --------------- $hash = null; $hash ?? 'test'; // output 'test' $hash = ''; $hash ?? 'test'; // output '' - WHY???? $hash = ""; !$hash ? 'test' : $hash; // output 'test' Expected result: ---------------- $hash = null; $hash ?? 'test'; // output 'test' $hash = ''; $hash ?? 'test'; // output 'test' - it's normal $hash = ""; !$hash ? 'test' : $hash; // output 'test' -- Edit bug report at https://bugs.php.net/bug.php?id=75209&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75209&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75209&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75209&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75209&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75209&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75209&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75209&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75209&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75209&r=support Expected behavior: https://bugs.php.net/fix.php?id=75209&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75209&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75209&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75209&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75209&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75209&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75209&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75209&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75209&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75209&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75209&r=mysqlcfg