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<?php declare(strict=1); class Test { } class A { public function abc(): Test { return null; } } $b = new A; print_r([ $b->abc() ]);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Warning: Unsupported declare 'strict' in /in/OSW0E on line 2 Fatal error: Uncaught TypeError: A::abc(): Return value must be of type Test, null returned in /in/OSW0E:10 Stack trace: #0 /in/OSW0E(17): A->abc() #1 {main} thrown in /in/OSW0E on line 10
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
Warning: Unsupported declare 'strict' in /in/OSW0E on line 2 Fatal error: Uncaught TypeError: Return value of A::abc() must be an instance of Test, null returned in /in/OSW0E:10 Stack trace: #0 /in/OSW0E(17): A->abc() #1 {main} thrown in /in/OSW0E on line 10
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
Warning: Unsupported declare 'strict' in /in/OSW0E on line 2 Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/OSW0E on line 9
Process exited with code 255.

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