#41145 [NEW]: Interface, Abstract Class & Methods

From: gerald at copix dot org Operating system: Linux PHP version: 5.2.1 PHP Bug Type: Class/Object related Bug description: Interface, Abstract Class & Methods Description: ------------ When we want to implement an interface in a child class that extends an abstract class that contains an abstract method that is in the interface, we get an error. This kind of bug has already been submited in #35057 and was marked as bogus because AClasse::show obviously is not the same as IClasse::show. But in the code we only say that IClasse::show is the same as AClasseConcrete::show. To me, the IClasse should not care how AClasseConcrete manage to implements the interface. The important thing is that AClasseConcrete::show IS the same as IClasse::show. I've checked the documentation and was not able to find this exact case and I've try this concept in other langages (like Java) with success. I think at least it should be discussed. If it has been discussed already, I'm really sorry for the time I made you spent on this. Greatings Reproduce code: --------------- interface IClasse { public function show (); } abstract class AClasse { abstract public function show (); } class AClasseConcrete extends AClasse implements IClasse { public function show (){ echo "Everything is ok"; } } $classe = new AClasseConcrete (); $classe->show (); Expected result: ---------------- "Everything is ok" Actual result: -------------- Fatal error: Can't inherit abstract function IClasse::show() (previously declared abstract in AClasse) in /home/geraldc/workspace/Copix_3/www/syntax_playground.php -- Edit bug report at http://bugs.php.net/?id=41145&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=41145&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=41145&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=41145&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=41145&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=41145&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=41145&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=41145&r=needscript Try newer version: http://bugs.php.net/fix.php?id=41145&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=41145&r=support Expected behavior: http://bugs.php.net/fix.php?id=41145&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=41145&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=41145&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=41145&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41145&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=41145&r=dst IIS Stability: http://bugs.php.net/fix.php?id=41145&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=41145&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=41145&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=41145&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=41145&r=mysqlcfg