Naturally sort a multi-dimensional array by key

Check out strnatcmp(); This is a natural sort by key function using it:

function knatsort(&$arr){return uksort($arr,function($a, $b){return strnatcmp($a,$b);});}

Works in place with the speed and return value of uksort. Use it like this:

knatsort($array);

Something simpler. Extract the array keys and sort those, sorting the original by that:

array_multisort(array_keys($array), SORT_NATURAL, $array);

With case insensitivity:

array_multisort(array_keys($array), SORT_NATURAL | SORT_FLAG_CASE, $array);

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