Array sort
Before sort
Array
(
[1] => B
[2] => N
[3] => p
[4] => 1
[5] => t
[6] => t
[7] => M
[8] => g
[9] => 4
)
After sort
Array
(
[0] => 1
[1] => 4
[2] => B
[3] => M
[4] => N
[5] => g
[6] => p
[7] => t
[8] => t
)