如何从多维数组中仅内插()一列？

Question

我有以下格式的数组:

Array
(
    [sales] => Array
        (
            [0] => Array
                (
                    [0] => 1
                    [1] => 6
                )

            [1] => Array
                (
                    [0] => 2
                    [1] => 8
                )

            [2] => Array
                (
                    [0] => 3
                    [1] => 25
                )

            [3] => Array
                (
                    [0] => 4
                    [1] => 34
                )

        )

)

使用:

foreach ($data['sales'] as $k => $row) {
    $list = implode(",",$row);
}

我得到以下输出:

1,62,83,254,34

但我只需要每个subArray的第二个值.预期结果必须是:

6,8,25,34

如何删除第一组值？

Answer 1

只需从数组中获取第一列array_column(),以便最终得到一个数组,例如

Array (
    [0] => 6
    [1] => 8
    [2] => 25
    [3] => 34
)

而且implode()它会出现你已经做了,例如,

echo implode(",", array_column($data["sales"], 1));

输出:

6,8,25,34

Answer 2

我喜欢，array_column()但如果您没有 PHP >= 5.5.0：

$list = implode(',', array_map(function($v) { return $v[1]; }, $data['sales']));

或与foreach：

foreach ($data['sales'] as $row) {
    $list[] = $row[1];
}
$list = implode(',', $list);