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<?php class X {} class Y extends X {} interface InterfaceA { function beMyself(X $a);//: self; } class ClassA implements InterfaceA { function beMyself(Y $a) //: self { return $this; } } var_dump((new ClassA)->beMyself());
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of ClassA::beMyself(Y $a) must be compatible with InterfaceA::beMyself(X $a) in /in/6sk1i on line 14
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of ClassA::beMyself(Y $a) must be compatible with InterfaceA::beMyself(X $a) in /in/6sk1i on line 12
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Declaration of ClassA::beMyself() must be compatible with InterfaceA::beMyself(X $a) in /in/6sk1i on line 13
Process exited with code 255.
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273.54 ms | 402 KiB | 330 Q