在PHP中更改多维数组的键

这是我的第一个数组

Array
(
   [0] => Array
        (
            [0] => 1
            [1] => Elite
            [2] => Air-Con Bus
            [3] => Monday
        )

    [1] => Array
        (
            [0] => 4
            [1] => KBZ
            [2] => Airplane
            [3] => Wednesday
        )
    [2] => Array
        (
            [0] => 5
            [1] => Yoma
            [2] => Cruise
            [3] => Tuesday
        )
)

我想将内部

数组[0]

连接到外部数组键。就像下面的数组：我能不能？请推荐我

Array(
     [1] => Array
        (
            [0] => 1
            [1] => Elite
            [2] => Air-Con Bus
            [3] => Monday
        )

    [4] => Array
        (
            [0] => 4
            [1] => KBZ
            [2] => Airplane
            [3] => Wednesday
        )

    [5] => Array
        (            
            [0] => 5
            [1] => Yoma
            [2] => Cruise
            [3] => Tuesday
        )
)

单向：

foreach ($array as $a){
$new[$a[0]]=$a;
}

---

对我可以那样做！非常感谢！：）我真的很好奇：为什么这个琐碎的解决方案不明显？它几乎来自您对问题的描述：使用元素[0]作为新数组的键。是的。我可以那样做！非常感谢！：）

foreach ($array as $a){
$new[$a[0]]=$a;
}