如何从多个数组中获取最后一个数组

Question

我有一个数组里面有一些其他的数组:

如果我print_r($u)，我得到:

Array
(
    [0] => Albany
)
Array
(
    [0] => Albany
Array
(
    [0] => Albany
    [41] => Albuquerque
)
Array
(
    [0] => Albany
    [41] => Albuquerque
)
Array
(
    [0] => Albany
    [41] => Albuquerque
    [54] => Atlanta
)
Array
(
    [0] => Albany
    [41] => Albuquerque
    [54] => Atlanta
)
Array
(
    [0] => Albany
    [41] => Albuquerque
    [54] => Atlanta
    [93] => Auckland
    [94] => Augusta
)
Array
(
    [0] => Albany
    [41] => Albuquerque
    [54] => Atlanta
    [93] => Auckland
    [94] => Augusta
)
...

最后一个数组大约有20个元素。我只需要最后一个数组。

Answer 1

您可以使用end()函数:

$last_array = end($u);

请记住，调用end()将改变内部数组指针。如果你不希望发生这种情况，你可以这样做:

$last_array = $u[count($u) - 1]; // make sure count($u) > 0

Answer 2

如果您只想从数组$u中获取最后一项，您可以使用end函数(无论其类型是什么):

$lastarray = end($u);

Answer 3

$arr = array_slice($u, -1);呢?(将返回一个只包含您想要的数组的数组)还是$arr = array_pop($u) ?