Array sort
Before sort
Array
(
[1] => F
[2] => 7
[3] => N
[4] => a
[5] => e
[6] => F
[7] => t
[8] => e
[9] => b
)
After sort
Array
(
[0] => 7
[1] => F
[2] => F
[3] => N
[4] => a
[5] => b
[6] => e
[7] => e
[8] => t
)