Array sort
Before sort
Array
(
[1] => u
[2] => A
[3] => A
[4] => U
[5] => c
[6] => A
[7] => N
[8] => l
[9] => B
)
After sort
Array
(
[0] => A
[1] => A
[2] => A
[3] => B
[4] => N
[5] => U
[6] => c
[7] => l
[8] => u
)