sort() puts alphanumeric string ending in 10 before another string ending in 2

Question

I'm having trouble sorting an array in PHP and I'm having some trouble with the basic sort() routine.

For example,

$arr = array("J1", "N1", "J10", "J2");

When using the sort routine, my output is: J1, J10, J2, N1.

My desired output is: J1, J2, J10, N1.

Does anyone know a more suited sorting algorithm for this type of problem?

Answer 1

Look at the natsort function.

$arr = array("J1", "N1", "J10", "J2");
natsort($arr);

var_dump($arr);

array(4) {
  [0]=>
  string(2) "J1"
  [3]=>
  string(2) "J2"
  [2]=>
  string(3) "J10"
  [1]=>
  string(2) "N1"
}