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run code in 150+ php & hhvm versions
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<?php $result = array_reduce(range(1, 5, 1), function ($cur, $x) { $cur[$x] = $x; return $cur; }, array()); var_dump($result);
Output for 5.3.0 - 7.1.0
array(5) { [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) [5]=> int(5) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/6l0AC on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/6l0AC on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/6l0AC on line 3
Process exited with code 255.