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<?php function blah(__PHP_Incomplete_Class $arg1) { echo "Hello"; } blah(new DateTime());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: blah(): Argument #1 ($arg1) must be of type __PHP_Incomplete_Class, DateTime given, called in /in/V23nU on line 8 and defined in /in/V23nU:3 Stack trace: #0 /in/V23nU(8): blah(Object(DateTime)) #1 {main} thrown in /in/V23nU on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to blah() must be an instance of __PHP_Incomplete_Class, instance of DateTime given, called in /in/V23nU on line 8 and defined in /in/V23nU:3 Stack trace: #0 /in/V23nU(8): blah(Object(DateTime)) #1 {main} thrown in /in/V23nU on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Catchable fatal error: Argument 1 passed to blah() must be an instance of __PHP_Incomplete_Class, instance of DateTime given, called in /in/V23nU on line 8 and defined in /in/V23nU on line 3
Process exited with code 255.

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