如何使用数组值作为没有循环的键? [英] How to use array values as keys without loops?

问题描述

循环很耗时，我们都知道.这正是我试图避免的事情，即使它的规模很小.每一点都有帮助.好吧，当然如果它没有设置:)

Looping is time consuming, we all know that. That's exactly something I'm trying to avoid, even though it's on a small scale. Every bit helps. Well, if it's unset of course :)

我有一个数组:

array(3) {
    '0' => array(2) {
        'id'   => 1234,
        'name' => 'blablabla',
    },
    '1' => array(2) {
        'id'   => 1235,
        'name' => 'ababkjkj',
    },
    '2' => array(2) {
        'id'   => 1236,
        'name' => 'xyzxyzxyz',
    },
}

我想要做的是按如下方式转换这个数组:

What I'm trying to do is to convert this array as follows:

array(3) {
    '1234' => 'blablabla',
    '1235' => 'asdkjrker',
    '1236' => 'xyzxyzxyz',
}

我想这不是一件很难的事情，但我现在脑子里一片空白，除了循环来完成这件事外，我想不出任何事情.

I guess this aint a hard thing to do but my mind is busted right now and I can't think of anything except for looping to get this done.

推荐答案

只需使用 array_combine 和 array_column as

Simply use array_combine along with the array_column as

array_combine(array_column($array,'id'), array_column($array,'name'));

或者你可以简单地使用 array_walk 如果你有 PHP <5.5 为

Or you can simply use array_walk if you have PHP < 5.5 as

$result = array();
array_walk($array, function($v)use(&$result) {
    $result[$v['id']] = $v['name']; 
});

已

对于 PHP > 5.5 的未来用户可以简单地使用 array_column as

For future user who has PHP > 5.5 can simply use array_column as

array_column($array,'name','id');

小提琴(array_walk)

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