3v4l.org

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<?php class Base {} class Sub extends Base{} class NoRelation {} interface I { public function foo(Sub $x); } class CorrectImplementor implements I { public function foo(Base $x) {} // Should be ok } class IncorrectImplementor implements I { public function foo(NoRelation $x) {} // Should be disallowed }
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 IncorrectImplementor::foo(NoRelation $x) must be compatible with I::foo(Sub $x) in /in/5QNhb on line 16
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of CorrectImplementor::foo(Base $x) must be compatible with I::foo(Sub $x) in /in/5QNhb on line 11
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Declaration of CorrectImplementor::foo() must be compatible with I::foo(Sub $x) in /in/5QNhb on line 11
Process exited with code 255.
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