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<?php function sum (int ...$numbers) : int { return array_sum(...$numbers); } var_dump(sum(1, 2, 3));
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 ArgumentCountError: array_sum() expects exactly 1 argument, 3 given in /in/UVtqB:4 Stack trace: #0 /in/UVtqB(4): array_sum(1, 2, 3) #1 /in/UVtqB(7): sum(1, 2, 3) #2 {main} thrown in /in/UVtqB on line 4
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_sum() expects exactly 1 parameter, 3 given in /in/UVtqB on line 4 Fatal error: Uncaught TypeError: Return value of sum() must be of the type int, null returned in /in/UVtqB:4 Stack trace: #0 /in/UVtqB(7): sum(1, 2, 3) #1 {main} thrown in /in/UVtqB on line 4
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
Warning: array_sum() expects exactly 1 parameter, 3 given in /in/UVtqB on line 4 Fatal error: Uncaught TypeError: Return value of sum() must be of the type integer, null returned in /in/UVtqB:4 Stack trace: #0 /in/UVtqB(7): sum(1, 2, 3) #1 {main} thrown in /in/UVtqB on line 4
Process exited with code 255.
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/UVtqB on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /in/UVtqB on line 3
Process exited with code 255.

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