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run code in 150+ php & hhvm versions
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<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; function change_keys($array, $callback) { $temp = array_map($callback, array_combine(array_keys($array), array_keys($array))); return array_combine($temp, $array); } $add_hash = function($v) { return '#' . $v; }; $new_array = change_keys($foo, $add_hash); var_dump($new_array);
based on oXcoW
Output for 5.4.0 - 5.4.32
Parse error: syntax error, unexpected '$add_hash' (T_VARIABLE) in /in/NCM0Y on line 15
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/NCM0Y 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 '[' in /in/NCM0Y on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/NCM0Y on line 3
Process exited with code 255.