如何从PHP中的多维数组中删除外部数组而无需循环

Question

我有一个多维数组，我想在不使用任何循环函数或php中的数组索引的情况下将该数组转换为一维数组

任何建议都是最欢迎的

Array
(
[0] => Array
    (
        [0] => Volvo
        [1] => 22
        [2] => 18
    )

[1] => Array
    (
        [0] => BMW
        [1] => 15
        [2] => 13
    )

[2] => Array
    (
        [0] => Saab
        [1] => 5
        [2] => 2
    )

[3] => Array
    (
        [0] => Land Rover
        [1] => 17
        [2] => 15
    )
)

预期结果是没有任何循环

[0] => Array
    (
        [0] => Volvo
        [1] => 22
        [2] => 18
    )

[1] => Array
    (
        [0] => BMW
        [1] => 15
        [2] => 13
    )

[2] => Array
    (
        [0] => Saab
        [1] => 5
        [2] => 2
    )

[3] => Array
    (
        [0] => Land Rover
        [1] => 17
        [2] => 15
    )