php怎麼添加數組

$my_array = array("apple", "banana", "orange");
array_push($my_array, "grape", "kiwi");
print_r($my_array);

$my_array = array("apple" => 1, "banana" => 2, "orange" => 3);
$my_array["grape"] = 4;
$my_array["kiwi"] = 5;
print_r($my_array);

Array
(
    [apple] => 1
    [banana] => 2
    [orange] => 3
    [grape] => 4
    [kiwi] => 5
)

$my_array1 = array("apple", "banana", "orange");
$my_array2 = array("grape", "kiwi");
$my_array = array_merge($my_array1, $my_array2);
print_r($my_array);

$my_array = array("apple", "banana", "orange");
$my_array[] = "grape";
$my_array[] = "kiwi";
print_r($my_array);