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<?php declare(strict_types=1); namespace websharks; class test{ public function hello(int $string): string { return $string; } } echo (new test())->hello(1);
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: websharks\test::hello(): Return value must be of type string, int returned in /in/BnDkC:8 Stack trace: #0 /in/BnDkC(12): websharks\test->hello(1) #1 {main} thrown in /in/BnDkC on line 8
Process exited with code 255.
Output for 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Return value of websharks\test::hello() must be of the type string, int returned in /in/BnDkC:8 Stack trace: #0 /in/BnDkC(12): websharks\test->hello(1) #1 {main} thrown in /in/BnDkC on line 8
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
Fatal error: Uncaught TypeError: Return value of websharks\test::hello() must be of the type string, integer returned in /in/BnDkC:8 Stack trace: #0 /in/BnDkC(12): websharks\test->hello(1) #1 {main} thrown in /in/BnDkC on line 8
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Warning: Unsupported declare 'strict_types' in /in/BnDkC on line 3 Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/BnDkC on line 7
Process exited with code 255.

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