获取子数组的第一个元素作为其键 [英] Get first element of sub array as its key

问题描述

我正在寻找一种转换关联数组键的简单方法.我希望子数组的键是他自己的第一个值.是否可以更改此内容:

I'm looking for an easy way to transform the keys of an associative array. I want the key of the sub array to be te first value of himself. Is it possible to change this :

Array
(
[0] => Array
    (
        [symbol] => ETHBTC
        [status] => TRADING
    )
[1] => Array
    (
        [symbol] => LTCBTC
        [status] => TRADING
    )
)

对此:

Array
(
[ETHBTC] => Array
    (
        [status] => TRADING
    )
[LTCBTC] => Array
    (
        [status] => TRADING
    )
)

推荐答案

这并不能完全给出您的确切输出，但是可能是您的后继结果...

This doesn't quite give your exact output, but it may be what your after...

$data = Array
(
        Array
        (
                'symbol' => 'ETHBTC',
                'status' => 'TRADING'
                ),
        Array
        (
                'symbol' => 'LTCBTC',
                'status' => 'TRADING2'
                )
        );

$data = array_column($data, null, 'symbol');
print_r($data);
echo $data['LTCBTC']['status'];

给予...

Array
(
    [ETHBTC] => Array
        (
            [symbol] => ETHBTC
            [status] => TRADING
        )

    [LTCBTC] => Array
        (
            [symbol] => LTCBTC
            [status] => TRADING2
        )

)
TRADING2

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