如何获得数组的差异

Question

我有二维阵列。

包含一些可用名称的Array1：

Array1
(
[0] => Array
     (
         [quantity] => 13
         [idname] => 3
         [x_name] => Name-3
     )

[1] => Array
    (
        [quantity] => 5
        [idname] => 4
        [x_name] => Name-4
    )

)

和包含所有可用名称的Array2：

Array2
(
    [0] => Array
        (
            [id_x] => 3
            [x_name] => Name-3
            [id_l] => 4
        )

    [1] => Array
        (
            [id_x] => 4
            [x_name] => Name-4
            [id_l] => 8
        )

    [2] => Array
        (
            [id_x] => 5
            [x_name] => Name-5
            [id_l] => 7
        )

    [3] => Array
        (
            [id_x] => 6
            [x_name] => Name-6
            [id_l] => 5
        )

)

Array1 = Array2和Array1 = Array2 (ofc.)

我希望输出的是来自Array2的所有Array1不包含的元素.因此：

Arraydesire
(

    [0] => Array
        (
            [id_x] => 5
            [x_name] => Name-5
            [id_l] => 7
        )

    [1] => Array
        (
            [id_x] => 6
            [x_name] => Name-6
            [id_l] => 5
        )

)

我试着使用array_intersect，但没有工作。谢谢你的帮助。

Answer 1

您可以使用嵌套的foreach循环。如果array2当前元素的值在array1中找到，请删除该元素：

foreach($array2 as $key => $value){
    foreach($array1 as $val){
        if($value['x_name']==$val['x_name']){
            unset($array2[$key]);
            $break;
        }
    }
}
var_dump($array2);

实例：http://codepad.viper-7.com/eOOUi6

Answer 2

看看array_diff (http://php.net/manual/en/function.array-diff.php)，

$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array("b" => "green", "yellow", "red");
$result = array_diff($array1, $array2);
print_r($result);

Array
(
    [1] => blue
)

否则，您可能需要编写一个遍历array2的循环，查看它是否在array1中，如果它没有将其添加到一个新数组中，则输出该数组。

Answer 3

<?php
$arr1 = Array();
$arr1[] = Array('quantity' => 13, 'idname' => 3, 'x_name' => 'Name-3');
$arr1[] = Array('quantity' => 5, 'idname' => 4, 'x_name' => 'Name-4');


$arr2 = Array();
$newTemp = Array();
$arr2[] = Array('id_x' => 3, 'x_name' => 'Name-3', 'id_l' => 4);
$arr2[] = Array('id_x' => 4, 'x_name' => 'Name-4', 'id_l' => 8);
$arr2[] = Array('id_x' => 5, 'x_name' => 'Name-5', 'id_l' => 7);
$arr2[] = Array('id_x' => 6, 'x_name' => 'Name-6', 'id_l' => 5);

$newTemp = $arr2;
foreach ($arr1 as $subArray1) {
    foreach ($arr2 as $key => $subArray2) {
        if ($subArray1['x_name']==$subArray2['x_name']) {
            unset($newTemp[$key]);
            break;
        }
    }
}
print_r($arr1);
print_r($arr2);
print_r($newTemp);
?>