如何使用嵌套键从多维中获取列 [英] How to get column from a multidimensional with nested key

问题描述

如何使用嵌套键从多维中获取列

How to get column from a multidimensional with nested key

我有一个多维数组。我必须拉一个键作为列，但它是嵌套的。例如对象访问如何使用最少的代码行或优化代码来实现这一目标。

I have an array which is multidimensional. I have to pull a key as column but it is nested. like object accessing how to achieve this with minimum line of code or optimized.

数组

$array = [
    [
        'price' => [
            'cost' => 200, 'tax' => 10, 'total' => 210
        ],
        'otherKey' => 'etc'
    ],

    [
        'price' => [
            'cost' => 500, 'tax' => 50, 'total' => 550
        ],
        'otherKey' => 'etc'
    ],
    [
        'price' => [
            'cost' => 600, 'tax' => 60, 'total' => 660
        ],
        'otherKey' => 'etc'
    ],
];

因为这可以通过使用 foreach 完成， array_map（）和 array_column（）

becuase this can be done by using foreach, array_map() and array_column()

I

使用 array_column（）

using array_column()

$result = array_column(array_column($array, 'price'), 'total');
printf($result); 

在上面我必须使用 array_column（）两次我不想使用

in above i have to use array_column() two time that i don't want to use

使用 foreach

using foreach

$result = [];
foreach ($array as $value) {
    $result[] = $value['price']['total'];
}
printf($result);

这很好，但是还有更好的方法。

this is working good but is there any better way.

有什么方法可以在 array_column（）中指定嵌套键，例如

is there any way that i can specify nested key in array_column() like

array_column($array, 'price.total'); // something like this

结果

array: [
    0 => 210
    1 => 550
    2 => 660
]

我已经搜索了，但是找不到这样的问题，我就是这样问的。

i have searched but unable to find any question like this that's way i asked.

预先感谢。

推荐答案

foreach 是更好的方法，即使您可以为自己能想到的性能建立基准。

foreach is better way to do that even you can do a benchmark for performance you can have idea.

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