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<?php class Foo implements DateTimeInterface { }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 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: DateTimeInterface can't be implemented by user classes in /in/eMn15 on line 3
Process exited with code 255.
Output for 5.5.8 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: DateTimeInterface can't be implemented by user classes in /in/eMn15 on line 4
Process exited with code 255.
Output for 5.5.0 - 5.5.7
Fatal error: Class Foo contains 6 abstract methods and must therefore be declared abstract or implement the remaining methods (DateTimeInterface::format, DateTimeInterface::getTimezone, DateTimeInterface::getOffset, ...) in /in/eMn15 on line 6
Process exited with code 255.

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