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<?php function henk(string $hans): string { var_dump($hans); } henk(null); henk("ben ik");
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: henk(): Argument #1 ($hans) must be of type string, null given, called in /in/N447V on line 8 and defined in /in/N447V:3 Stack trace: #0 /in/N447V(8): henk(NULL) #1 {main} thrown in /in/N447V on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 henk() must be of the type string, null given, called in /in/N447V on line 8 and defined in /in/N447V:3 Stack trace: #0 /in/N447V(8): henk(NULL) #1 {main} thrown in /in/N447V 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 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/N447V on line 3
Process exited with code 255.

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