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<?php interface Test { public function check(Test $x); } interface TestTest extends Test { public function check(TestTest $x); }; //this is ok: class Foo implements Test { public function check(Test $x) {} } //this is fail, but why? Bar implements Test, so.. logically it fulfills contract.. class Bar implements TestTest { public function check(TestTest $x) {} }
Output for 7.0.0 - 7.1.0
Fatal error: Declaration of TestTest::check(TestTest $x) must be compatible with Test::check(Test $x) in /in/WFu91 on line 8
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Uncaught Error: Declaration of TestTest::check() must be compatible with that of Test::check() in /in/WFu91:8 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.10.0
Fatal error: Declaration of TestTest::check() must be compatible with that of Test::check() in /in/WFu91 on line 8
Process exited with code 255.
Output for 5.4.0 - 5.6.28
Fatal error: Declaration of TestTest::check() must be compatible with Test::check(Test $x) in /in/WFu91 on line 9
Process exited with code 255.
Output for 5.3.9 - 5.3.29
Fatal error: Declaration of TestTest::check() must be compatible with that of Test::check() in /in/WFu91 on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.8
Fatal error: Can't inherit abstract function Test::check() (previously declared abstract in TestTest) in /in/WFu91 on line 9
Process exited with code 255.
Output for 5.0.0 - 5.2.17
Fatal error: Can't inherit abstract function Test::check() (previously declared abstract in TestTest) in /in/WFu91 on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/WFu91 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/WFu91 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/WFu91 on line 3
Process exited with code 255.