array_diff() 与多维数组 [英] array_diff() with multidimensional arrays

问题描述

使用array_diff()，我可以比较和删除相似的项目，但如果我有以下数组怎么办?

Using array_diff(), I can compare and remove similar items, but what if I have the following arrays?

数组1

Array
(
    [0] => Array
        (
            [ITEM] => 1
        )

    [1] => Array
        (
            [ITEM] => 2
        )

    [2] => Array
        (
            [ITEM] => 3
        )
)

数组 2

Array
(
    [0] => Array
        (
            [ITEM] => 2
        )

    [1] => Array
        (
            [ITEM] => 3
        )

    [2] => Array
        (
            [ITEM] => 1
        )
    [3] => Array
        (
            [ITEM] => 4
        )
)

我想过滤掉相似的项目；结果应该返回 4.如何重新排列我的数组以便我可以使用 array_diff()?

I want to filter out the similar items; result should return 4. How can I rearrange my array so that I can use array_diff()?

推荐答案

我可能会遍历原始数组并使它们成为一维......类似

I would probably iterate through the original arrays and make them 1-dimensional... something like

foreach($array1 as $aV){
    $aTmp1[] = $aV['ITEM'];
}

foreach($array2 as $aV){
    $aTmp2[] = $aV['ITEM'];
}

$new_array = array_diff($aTmp1,$aTmp2);

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