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<?php function x($n){ for($i=1;$i<$n;$i++){ !$n%$i ? $f[]=$i:0; } echo array_sum(@$f)==$n?"P":"I"; } x(28);
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: array_sum(): Argument #1 ($array) must be of type array, null given in /in/RDTfu:6 Stack trace: #0 /in/RDTfu(6): array_sum(NULL) #1 /in/RDTfu(8): x(28) #2 {main} thrown in /in/RDTfu on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_sum() expects parameter 1 to be array, null given in /in/RDTfu on line 6 I
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: array_sum(): The argument should be an array in /in/RDTfu on line 6 I
Output for 4.3.0 - 4.3.1
Warning: array_sum() [http://www.php.net/function.array-sum]: The argument should be an array in /in/RDTfu on line 6 I

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241.31 ms | 401 KiB | 314 Q