如何从多维数组中只内爆()一列?

Question

我有如下格式的数组:

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

但是我只需要每个subArray的第二个值。预期的结果需要是:

6,8,25,34

如何删除第一组值?

Answer 1

用array_column()从数组中抓取第一列，这样你就可以得到一个数组，例如

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

然后implode()就像你已经做的那样，例如

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

输出:

6,8,25,34

Answer 2

我喜欢array_column()，但如果你没有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);