从二维数组的子数组中删除"列"

Question

我有一个简单的二维数组,如下所示:

Array
    (
        [0] => Array
            (
                [0] => abc
                [1] => 123
                [2] => aaaaa

            )

        [1] => Array
            (
                [0] => def
                [1] => 456
                [2] => ddddd
            )

        [2] => Array
            (
                [0] => ghi
                [1] => 789
                [2] => hhhhhhh
            )
    )

我正在尝试编写一个有效的函数,它将返回一个只包含每个子数组的第一个'n'列的数组.换句话说,如果n = 2,那么返回的数组将是:

Array
    (
        [0] => Array
            (
                [0] => abc
                [1] => 123


            )

        [1] => Array
            (
                [0] => def
                [1] => 456

            )

        [2] => Array
            (
                [0] => ghi
                [1] => 789

            )
    )

Answer 1

const MAX = 2; // maximum number of elements
foreach ($array as &$element) {
    $element = array_slice($element, 0, MAX);
}