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<?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
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
string(5) "a(10)" string(5) "a(10)" array(3) { [0]=> string(1) "b" [1]=> int(16) [2]=> int(22) } Fatal error: Uncaught Error: Cannot call abstract method Foo::b() in /in/4EKo2:23 Stack trace: #0 {main} thrown in /in/4EKo2 on line 23
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
string(5) "a(10)" string(5) "a(10)" array(3) { [0]=> string(1) "b" [1]=> int(16) [2]=> int(22) } Fatal error: Cannot call abstract method Foo::b() in /in/4EKo2 on line 23
Process exited with code 255.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/4EKo2 on line 23
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/4EKo2 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/4EKo2 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/4EKo2 on line 2
Process exited with code 255.

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