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<?php function o($f, $g) { return function (...$x) { return $f(...$g(...$x)); }; } $f = function ($a, $b) { return [$a + $b, $a * $b]; }; $g = function (...$n) { return array_map(function ($n) { return n ** 2; }, $n); }; $h = o($f, $g); var_dump($h(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 - 8.3.7
Warning: Undefined variable $f in /in/JgJOv on line 6 Fatal error: Uncaught Error: Value of type null is not callable in /in/JgJOv:6 Stack trace: #0 /in/JgJOv(22): {closure}(2, 3) #1 {main} thrown in /in/JgJOv on line 6
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: f in /in/JgJOv on line 6 Fatal error: Uncaught Error: Function name must be a string in /in/JgJOv:6 Stack trace: #0 /in/JgJOv(22): {closure}(2, 3) #1 {main} thrown in /in/JgJOv on line 6
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Function name must be a string in /in/JgJOv:6 Stack trace: #0 /in/JgJOv(22): {closure}(2, 3) #1 {main} thrown in /in/JgJOv on line 6
Process exited with code 255.
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184.37 ms | 401 KiB | 218 Q