PHP - 按另一个数组对多维数组进行排序

2021-12-21 00:00:00 multidimensional-array sorting php

我正在尝试按另一个数组对多维数组进行排序，但到目前为止还不够.
array_multisort 似乎只适用于真正的排序.

I'm trying to sort a multi-dimensional array by another array, but have so far come up short.
array_multisort seems be working only for real sorting.

假设我有这两个数组:

$order = array(2,3,1);

$data = array(
    array('id' => 1, 'title' => 'whatever'),
    array('id' => 2, 'title' => 'whatever'),
    array('id' => 3, 'title' => 'whatever')
);

现在我想根据我的 $order 数组中的顺序对我的 $data 数组进行排序.
这就是我想要的结果:

Now I would like to sort my $data array according to the order in my $order array.
This is what I would like the result to be:

$data = array(
    array('id' => 2, 'title' => 'whatever'),
    array('id' => 3, 'title' => 'whatever')
    array('id' => 1, 'title' => 'whatever'),
);

<小时>

我可以通过运行嵌套循环轻松完成此操作，但这不能很好地扩展(我的数组非常大，并且数组有更多字段).

I can accomplish this easily by running a nested loop, but that would not scale well (my array is pretty big, and the arrays have many more fields).

推荐答案

PHP 中没有为此内置函数，我无法想到任何自定义函数，它可以使用 usort 来做到这一点.但是 array_map 已经足够简单了，imo，为什么不改用它呢?

There is no built-in function for this in PHP and i am unable to think of any custom function, which would do this using usort. But array_map is simple enough, imo, so why not use it instead?

$sorted = array_map(function($v) use ($data) {
    return $data[$v - 1];
}, $order);

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