Req #69110 [Opn->Dup]: Abstract method inheritance behaves differently from concrete inheritance

Edit report at https://bugs.php.net/bug.php?id=69110&edit=1 ID: 69110 Updated by: nikic@php.net Reported by: draconyster at gmai dot com Summary: Abstract method inheritance behaves differently from concrete inheritance -Status: Open +Status: Duplicate Type: Feature/Change Request Package: Scripting Engine problem PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Duplicate of bug #63384. Previous Comments: ------------------------------------------------------------------------ [2015-02-23 17:14:30] draconyster at gmai dot com Description: ------------ When extending abstract classes you are not allowed to change an abstract method's signature to a compatible one. This works perfectly fine for concrete classes though. Test script: --------------- //This code works: class A { public function a () {} } class B extends A { public function a ($t = false) {} } //this code throws an error: abstract class A { abstract public function a (); } abstract class B extends A { abstract public function a ($t = false); } Expected result: ---------------- Extending an abstract method should behaves consistently with extending concrete methods Actual result: -------------- Fatal error: Can't inherit abstract function A::a() (previously declared abstract in B) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=69110&edit=1