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<?php interface Specification { function isSatisfiedBy($object); } class Testing implements Specification { function isSatisfiedBy($object){} } class Testing2 implements Specification { function isSatisfiedBy(Testing $object){} }
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 Testing2::isSatisfiedBy(Testing $object) must be compatible with Specification::isSatisfiedBy($object) in /in/CfRke on line 11
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 Testing2::isSatisfiedBy(Testing $object) must be compatible with Specification::isSatisfiedBy($object) in /in/CfRke on line 10
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Declaration of Testing2::isSatisfiedBy() must be compatible with Specification::isSatisfiedBy($object) in /in/CfRke on line 10
Process exited with code 255.

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