Bug #68438 [NEW]: Can not inherit abstract function to extend its syntax

From: someone dot wanted dot to dot be dot unknown at gmail dot com Operating system: Linux PHP version: Irrelevant Package: Reproducible crash Bug Type: Bug Bug description:Can not inherit abstract function to extend its syntax Description: ------------ My code class A, that defined abstract method method with one argument. After that class B extends A. In this place I can not extend signature of method (for example, add new required arguments). Code is following. That's strange and non-intuitive behavior. This bug is appearing on PHP 5.0.0 - 5.6.3. Test script: --------------- abstract class A { abstract function method($a); } abstract class B extends A { abstract function method($a, $b); } Expected result: ---------------- none printable result Actual result: -------------- Fatal error: Can't inherit abstract function A::method() (previously declared abstract in B) in ... -- Edit bug report at https://bugs.php.net/bug.php?id=68438&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68438&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68438&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68438&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=68438&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=68438&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=68438&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=68438&r=needscript Try newer version: https://bugs.php.net/fix.php?id=68438&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=68438&r=support Expected behavior: https://bugs.php.net/fix.php?id=68438&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=68438&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=68438&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=68438&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68438&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=68438&r=dst IIS Stability: https://bugs.php.net/fix.php?id=68438&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=68438&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=68438&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=68438&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=68438&r=mysqlcfg