[英]How to Compare two multidimensional associative arrays with differen items count
我有兩個具有不同項目計數的多維關聯 arrays。 重要的是我不知道哪個數組會有更多元素(A 或 B)
第一個陣列(A):
[0] => Array
(
[catID] => 65
[discount] => 10
[productID] => Array
(
[0] => 10887
[1] => 8508
[2] => 8350
)
[startDate] => 05/12/2022 12:00 am
[endDate] => 10/12/2022 12:00 am
)
[1] => Array
(
[catID] => 66
[discount] => 10
[productID] => Array
(
[0] => 13184
[1] => 10707
[2] => 8350
)
[startDate] => 10/12/2022 12:00 am
[endDate] => 15/12/2022 12:00 am
)
第二個陣列(B):
[0] => Array
(
[catID] => 72
[discount] => 15
[productID] => Array
(
[0] => 16239
[1] => 16236
[2] => 10887
[3] => 13184
[4] => 8524
[5] => 13314
)
[startDate] => 12/12/2022 12:00 am
[endDate] => 15/12/2022 12:00 am
)
比較這些 arrays (A, B) 之后,我想檢索類似的內容:
數組 A(如果數組 B 中存在 productID,則將其移除):
[0] => Array
(
[catID] => 65
[discount] => 10
[productID] => Array
(
[1] => 8508
[2] => 8350
)
[startDate] => 05/12/2022 12:00 am
[endDate] => 10/12/2022 12:00 am
)
[1] => Array
(
[catID] => 66
[discount] => 10
[productID] => Array
(
[0] => 10707
)
[startDate] => 10/12/2022 12:00 am
[endDate] => 15/12/2022 12:00 am
)
數組 B(無變化):
[0] => Array
(
[catID] => 72
[discount] => 15
[productID] => Array
(
[0] => 16239
[1] => 16236
[2] => 10887
[3] => 13184
[4] => 8524
[5] => 13314
)
[startDate] => 12/12/2022 12:00 am
[endDate] => 15/12/2022 12:00 am
)
從第二個數組填充一個平面“黑名單”數組。
遍歷第一個數組的行並根據黑名單數組過濾 productId 值。
代碼:(演示)
$blacklist = array_merge(...array_column($b, 'productID'));
var_export(
array_map(
fn($row) => array_replace($row, ['productID' => array_values(array_diff($row['productID'], $blacklist))]),
$a
)
);
或者,如果您不介意經典的foreach()
,那么這可能更容易閱讀:(演示)
$blacklist = array_merge(...array_column($b, 'productID'));
foreach ($a as &$row) {
$row['productID'] = array_values(array_diff($row['productID'], $blacklist));
}
var_export($a);
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