php动态数组比较

$array1 = array("apple", "banana", "orange");
$array2 = array("banana", "orange", "grape");
$result = array_diff($array1, $array2);
print_r($result);

Array
(
    [0] => apple
)

$array1 = array("apple", "banana", "orange");
$array2 = array("banana", "orange", "grape");
$result = array_intersect($array1, $array2);
print_r($result);

Array
(
    [0] => banana
    [1] => orange
)

$array1 = array("a" => "apple", "b" => "banana", "c" => "orange");
$array2 = array("a" => "apple", "b" => "banana", "d" => "grape");
$result = array_diff_assoc($array1, $array2);
print_r($result);

Array
(
    [c] => orange
)

$array = array("apple", "banana", "Orange");
usort($array, function($a, $b) {
    return strcmp(strtolower($a), strtolower($b));
});
print_r($array);

Array
(
    [0] => apple
    [1] => banana
    [2] => Orange
)