Array sort

Before sort

Array
(
    [1] => X
    [2] => o
    [3] => c
    [4] => x
    [5] => q
    [6] => 3
    [7] => Z
    [8] => N
    [9] => 6
)

After sort

Array
(
    [0] => 3
    [1] => 6
    [2] => N
    [3] => X
    [4] => Z
    [5] => c
    [6] => o
    [7] => q
    [8] => x
)