sort array values by key using php

Question

i have an PHP array in the following format,

Array
(
    [0] => Array
        (
            [40] => 2
            [80] => 1
            [20] => 0
            [60] => 0
            [100] => 0
        )

    [1] => Array
        (
            [60] => 2
            [80] => 1
            [20] => 0
            [40] => 0
            [100] => 0
        )
)

Expected output is (20=>0,40=>0,60=>2,80=>1 etc) i tried using array_values and array_combine, but no luck.

How do i sort array by key using PHP.

Answer 1

Use array_combine (http://php.net/manual/en/function.array-combine.php) to combine the arrays and then use ksort (http://php.net/manual/en/function.ksort.php) to sort the keys.