Bug #65809 [Opn->Csd]: interface, abstract static function

Edit report at https://bugs.php.net/bug.php?id=65809&edit=1 ID: 65809 Updated by: nikic@php.net Reported by: spam at krol dot me Summary: interface, abstract static function -Status: Open +Status: Closed Type: Bug Package: Class/Object related PHP Version: 5.3.15 -Assigned To: +Assigned To: nikic Block user comment: N Private report: N New Comment: The strict standards notice no longer exists in PHP 7. Previous Comments: ------------------------------------------------------------------------ [2013-10-03 06:49:24] phpmpan at mpan dot pl I haven't noticed this, as the case doesn't produce an error, but only a E_STRICT level message. Ok, hence the report is now valid. However, be aware that the issue was already discussed and I believe this message is the source of the patch that removed "abstract static" 7 years ago: http://marc.info/?l=php-internals&m=114120699223033&w=2 ------------------------------------------------------------------------ [2013-10-03 05:21:40] spam at krol dot me And use this test case. It don't make use of constructor Test script: --------------- abstract class A { abstract static function aa(); } //invalid //Strict Standards: Static function A::aa() should not be abstract in php shell code on line 1 interface I { static function ii(); } //valid abstract class B implements I {} //valid //class C extends B{} // invalid //Fatal error: Class C contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (I::i) in php shell code on line 1 class D extends B{ static function ii(){echo "I have to be implemented"; } } ------------------------------------------------------------------------ [2013-10-03 05:10:24] spam at krol dot me I changed PHP version as it IS revelant According to this http://php.net/manual/en/migration52.incompatible.php Dropped abstract static class functions. Due to an oversight, PHP 5.0.x and 5.1.x allowed abstract static functions in classes. As of PHP 5.2.x, only interfaces can have them. ------------------------------------------------------------------------ [2013-10-02 23:43:36] phpmpan at mpan dot pl Abstract static methods are allowed. Abstract static *constructors* aren't. ------------------------------------------------------------------------ [2013-10-02 10:58:34] spam at krol dot me Description: ------------ abstract static function in class isn't allowed, but you can define static function in interface This leads to funny inconsistency where you can create abstract static function using interfaces Test script: --------------- //abstract class A { abstract static function a(); } //invalid interface I { static function i(); } //valid abstract class B implements I {} //valid //class C extends B{} // invalid //Fatal error: Class C contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (I::i) in php shell code on line 1 class D extends B{ static function i(){echo "I have to be implemented"; } } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65809&edit=1