降低PHP中多维数组的下降水平

Question

我想知道将这个数组减少一个级别的最有效方法是什么,理想情况下没有PHP中的循环.这是mysqli_fetch_all()的结果.

Array
(
    [0] => Array
        (
            [ID] => 648546
        )

    [1] => Array
        (
            [ID] => 648552
        )

    [2] => Array
        (
            [ID] => 650046
        )

    [3] => Array
        (
            [ID] => 652732
        )

    [4] => Array
        (
            [ID] => 652738
        )

    [5] => Array
        (
            [ID] => 652756
        )

)

我想要的结果是

array(648546,648552,650046,652732,...)

它来自的简单查询示例很简单:

SELECT mytable.ID FROM mytable WHERE status =1

Answer 1

这应该适用于PHP 5.5+

$result = array_column($array, 'ID');