<?php interface Foo { public static function a(); public static function b($arg); } abstract class Base implements Foo { public static function a() { return __FUNCTION__ . '(' . __LINE__ . ')'; } } class Concrete extends Base { public static function b($arg) { return array(__FUNCTION__, __LINE__, $arg); } } var_dump(Concrete::a()); // works var_dump(Base::a()); // works var_dump(Concrete::b(__LINE__)); // works var_dump(Base::b(__LINE__)); // can't call an abstract method
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