php 往数组中追加数组

$array1 = ['a', 'b', 'c'];
$array2 = ['d', 'e', 'f'];

$result = array_merge($array1, $array2);
print_r($result);

Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => d
    [4] => e
    [5] => f
)

$array1 = ['a' => 'apple', 'b' => 'banana'];
$array2 = ['b' => 'blueberry', 'c' => 'cherry'];

$result = $array1 + $array2;
print_r($result);

Array
(
    [a] => apple
    [b] => banana
    [c] => cherry
)

$array1 = ['a', 'b', 'c'];
$array2 = ['d', 'e', 'f'];

array_push($array1, ...$array2);
print_r($array1);

Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => d
    [4] => e
    [5] => f
)

$array1 = ['a', 'b', 'c'];
$array2 = ['d', 'e', 'f'];

$array1[] = ...$array2;
print_r($array1);

Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => d
    [4] => e
    [5] => f
)

$array1 = ['a' => 'apple', 'b' => 'banana'];
$array2 = ['b' => 'blueberry', 'c' => 'cherry'];

$result = array_merge_recursive($array1, $array2);
print_r($result);

Array
(
    [a] => apple
    [b] => Array
        (
            [0] => banana
            [1] => blueberry
        )

    [c] => cherry
)