在PHP中对哪个集合进行计数和排序

$array = array("apple", "banana", "apple", "orange", "banana");
$count = array_count_values($array);
print_r($count);

Array
(
    [apple] => 2
    [banana] => 2
    [orange] => 1
)

$array = array(5, 3, 8, 2, 1);
sort($array);
print_r($array);

rsort($array);
print_r($array);

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 5
    [4] => 8
)
Array
(
    [0] => 8
    [1] => 5
    [2] => 3
    [3] => 2
    [4] => 1
)