取消设置多维数组中的列

Unset a column in a multidimensional array(取消设置多维数组中的列)

问题描述

我有这个数组 $output 看起来像这样:

I have this array $output which looks like this:

Array(
    [0] => Array(
        [0] => 1a
        [1] => 1b
        [2] => 1c
    )
    [1] => Array(
        [0] => 2a
        [1] => 2b
        [2] => 2c
    )
    [2] => Array(
        [0] => 3a
        [1] => 3b
        [2] => 3c
    )
    [3] => Array(
        [0] => 4a
        [1] => 4b
        [2] => 4c
    )
)

等等...

当我想删除我只使用的第二个元素时:

When I want to remove the second element I just use:

$output = unset($output[1]);

获得以下内容:

Array(
    [0] => Array(
        [0] => 1a
        [1] => 1b
        [2] => 1c
    )
    [1] => Array(
        [0] => 3a
        [1] => 3b
        [2] => 3c
    )
    [2] => Array(
        [0] => 4a
        [1] => 4b
        [2] => 4c
    )
)

我的问题是如何删除数组中每个元素的第二个元素 ([0][1], [1][1], [2][1], [3][1] ,...) 得到以下内容:

My question is how to remove every second element of every element in the array ([0][1], [1][1], [2][1], [3][1] ,...) to get the following:

Array(
    [0] => Array(
        [0] => 1a
        [1] => 1c
    )
    [1] => Array(
        [0] => 2a
        [1] => 2c
    )
    [2] => Array(
        [0] => 3a
        [1] => 3c
    )
    [3] => Array(
        [0] => 4a
        [1] => 4c
    )
)

推荐答案

不能用简单的命令完成，但可以使用循环:

Can't be done with a simple command, but you can use a loop:

foreach(array_keys($output) as $key) {
   unset($output[$key][1]);
}

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