Bug #73348 [NEW]: A class can override a constant inherited from an indirect parent interface.

From: mkh117 at gmail dot com Operating system: Ubuntu 16.04.1 PHP version: 7.0.12 Package: Class/Object related Bug Type: Bug Bug description:A class can override a constant inherited from an indirect parent interface. Description: ------------ When a class inherits a constant from an interface that is not a direct parent of the class, it can override its value without any errors thrown. Test script: --------------- <?php interface a { const con = 'Original value'; } abstract class b implements a { } class d extends b { const con='Overridden value'; } echo d::con; Expected result: ---------------- Fatal error: Cannot inherit previously-inherited constant con from interface a ... on line 11 Actual result: -------------- The script works and the interface constant is overridden. -- Edit bug report at https://bugs.php.net/bug.php?id=73348&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73348&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73348&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73348&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73348&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73348&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73348&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73348&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73348&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73348&r=support Expected behavior: https://bugs.php.net/fix.php?id=73348&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73348&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73348&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73348&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73348&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73348&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73348&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73348&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73348&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73348&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73348&r=mysqlcfg