Array sort

Before sort

Array
(
    [1] => G
    [2] => c
    [3] => B
    [4] => b
    [5] => Z
    [6] => 7
    [7] => X
    [8] => e
    [9] => m
)

After sort

Array
(
    [0] => 7
    [1] => B
    [2] => G
    [3] => X
    [4] => Z
    [5] => b
    [6] => c
    [7] => e
    [8] => m
)