Sort multi-dimensional array by specific key

Question

I have an array:

Array (
    [0] => stdClass Object (
        [user_id] => 1
        [ID] => 1
        [user_login] => admin
        [display_nam         


        

Answer 1

See usort: http://php.net/manual/en/function.usort.php

usort($array, "my_cmp");

function my_cmp($a, $b) {
  if ($a->display_name == $b->display_name) {
    return 0;
  }
  return ($a->display_name < $b->display_name) ? -1 : 1;
}