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<?php trait T { abstract static function values(): array; } class A { use T; static function values() { return 'Worked!'; } } echo A::values(); // print: Worked! abstract class B { use T; } class C extends B { static function values() { return 'Don\'t worked'; } } echo C::values();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Fatal error: Declaration of A::values() must be compatible with T::values(): array in /in/38lmA on line 9
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Worked! Fatal error: Declaration of C::values() must be compatible with B::values(): array in /in/38lmA on line 21
Process exited with code 255.
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Worked! Fatal error: Declaration of C::values() must be compatible with B::values(): array in /in/38lmA on line 20
Process exited with code 255.
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