在PHP中对数组项进行排序,使其对字母不区分大小写

<?php
$array = array("Apple", "apple", "banana", "Banana", "Cherry", "cherry");

array_multisort($array, SORT_ASC, SORT_NATURAL | SORT_FLAG_CASE);

print_r($array);
?>

Array
(
    [0] => apple
    [1] => Appl
    [2] => banana
    [3] => Banana
    [4] => cherry
    [5] => Cherry
)