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<?php interface AAA{ function method($x); } interface BBB extends AAA{ function method($x, $y = null); } // this works correctly: class AA_ implements AAA{ function method($x){} } class BB_ extends AA_ implements BBB{ function method($x, $y = null){} } (new BB_())->method(1, 1); // this doesn't: abstract class AAA_ implements AAA{} abstract class BBB_ extends AAA_ implements BBB{} // AAA::method is checked to be compatible against BBB::method, // while it should happen the opposite
Output for 8.0.0 - 8.0.10, 8.1rc1 - rc2
Fatal error: Declaration of AAA::method($x) must be compatible with BBB::method($x, $y = null) in /in/LKFbZ on line 4
Process exited with code 255.
Output for 7.4.0 - 7.4.23
Fatal error: Declaration of AAA::method($x) must be compatible with BBB::method($x, $y = NULL) in /in/LKFbZ on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.30
Fatal error: Declaration of AAA::method($x) must be compatible with BBB::method($x, $y = NULL) in /in/LKFbZ on line 22
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Fatal error: Declaration of AAA::method() must be compatible with BBB::method($x, $y = NULL) in /in/LKFbZ on line 22
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/LKFbZ on line 18
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/LKFbZ on line 18
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/LKFbZ on line 3
Process exited with code 255.
Output for 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/LKFbZ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/LKFbZ on line 3
Process exited with code 255.

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