Question

我有两个数组，我想从array2中删除重复记录。我不想在数组2中使用link_id 35记录，因为在array1中存在link_id 35记录，因此它不在array2中显示。

我尝试使用array_map和Unique方法，但效果不佳，因为我认为两个数组的值都不相同。

$array1=

[0] => stdClass Object
        (
            [link_id] => 35
            [link_name] => Test Listerine cool mint packets 3 pack
            [alias] => aa
            [link_desc] => 
            [user_id] => 47
            [link_hits] => 103
            [link_votes] => 1
            [link_rating] => 5.000000
            [link_featured] => 0
            [link_published] => 1
            [link_approved] => 1
            [link_template] => 

        )

    [1] => stdClass Object
        (
            [link_id] => 373
            [link_name] => Test Subject Data Collection Fish Fresh Yellow Tail
            [alias] => ba
            [link_desc] =>
            [user_id] => 47
            [link_hits] => 198
            [link_votes] => 8
            [link_rating] => 2.875000
            [link_featured] => 0
            [link_published] => 1
            [link_approved] => 1
            [link_template] => 

        )



$array2 =

    [0] => stdClass Object
        (
            [link_id] => 35
            [link_name] => Test Listerine cool mint packets 3 pack
            [link_desc] => 
            [lat] => 0.000000
            [lng] => 0.000000
            [contactperson] => 
            [cat_name] => AA - Made in USA
            [link_votes] => 1
            [link_rating] => 5.000000
            [link_featured] => 0
            [value] => 30020864
        )

    [1] => stdClass Object
        (
            [link_id] => 541
            [link_name] => Test Subject Data Collection Fish Fresh Yellow Tail
            [link_desc] => 
            [lat] => 25.182573
            [lng] => -80.093079
            [country] => United States
            [postcode] => 33431
            [contactperson] => Captain Jack Certified Charters
            [cat_name] => BA - Product of USA
            [link_votes] => 8
            [link_rating] => 2.875000
            [link_featured] => 0
            [value] => NA
        )

Answer 1

您可以使用array-filter进行操作。首先从第一个数组中提取所有ids，然后根据这些ID过滤第二个数组。

$arr1 = array( (object) ["link_id"=> 35, "key" => "AAA"], (object) ["link_id"=> 373, "key" => "BBB"]);
$arr2 = array( (object) ["link_id"=> 35, "key" => "CCC"], (object) ["link_id"=> 341, "key" => "DDD"]);

$ids = array_column($arr1, "link_id");
$arr2 = array_filter($arr2, function ($e) use ($ids) {
    return !in_array($e->link_id, $ids); //keep him in arr2 only if NOT in ids of arr1
});

更新后的答案更快考虑大量数据（例如@mickmackusa评论）使用此方法

$ids = [];
foreach($arr1 as $e)
    $ids[$e->link_id] = true;

$arr2 = array_filter($arr2, function ($e) use ($ids) {
    return !isset($ids[$e->link_id]);
});

第一个解决方案在O(n^2)中，第二个解决方案在O(n)

Answer 2

这应该在php7中完成。

未经测试的代码：

var_export(array_diff_key(array_column($array2, null, 'link_id'), array_column($array1, null, 'link_id'));

将新的1级密钥分配给两个阵列，然后对这些密钥进行过滤。

检查密钥比迭代调用in_array更为有效。

当两个值的值不相同时如何从数组中删除数组值

2 个答案: