例子

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

$people = array("Swanson" => "Joe", 
"Griffin" => "Peter", "Quagmire" => "Glenn",
"swanson" => "joe", "griffin" => "peter",
"quagmire" => "glenn"); 

uasort($people, "my_sort");

print_r ($people);
?> 計算機學習網站www.boydavid.com 

輸出：

Array
(
[griffin] => peter
[swanson] => joe
[quagmire] => glenn
[Griffin] => Peter
[Swanson] => Joe
[Quagmire] => Glenn
)