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<?php function test(int $x) { var_export($x); } test(1); test(null); test('x');
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
1 Fatal error: Uncaught TypeError: test(): Argument #1 ($x) must be of type int, null given, called in /in/sXN9o on line 6 and defined in /in/sXN9o:3 Stack trace: #0 /in/sXN9o(6): test(NULL) #1 {main} thrown in /in/sXN9o on line 3
Process exited with code 255.
Output for 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
1 Fatal error: Uncaught TypeError: Argument 1 passed to test() must be of the type int, null given, called in /in/sXN9o on line 6 and defined in /in/sXN9o:3 Stack trace: #0 /in/sXN9o(6): test(NULL) #1 {main} thrown in /in/sXN9o on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33
1 Fatal error: Uncaught TypeError: Argument 1 passed to test() must be of the type integer, null given, called in /in/sXN9o on line 6 and defined in /in/sXN9o:3 Stack trace: #0 /in/sXN9o(6): test(NULL) #1 {main} thrown in /in/sXN9o on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to test() must be an instance of int, integer given, called in /in/sXN9o on line 5 and defined in /in/sXN9o on line 3
Process exited with code 255.

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