在多维数组中删除重复,并在PHP中具有最高价值 [英] delete duplicate on multidimensional array and take those having highest value in PHP
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问题描述
假设我有这个数组
[0] => Array
(
[revision_no] => 0
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000001
[gross] => 34650000
[vat] => 3465000
)
[1] => Array
(
[revision_no] => 1
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000001
[gross] => 44650000
[vat] => 4465000
)
[2] => Array
(
[revision_no] => 2
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000001
[gross] => 34650000
[vat] => 3465000
)
[3] => Array
(
[revision_no] => 0
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000002
[gross] => 34650000
[vat] => 3465000
)
[4] => Array
(
[revision_no] => 1
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000002
[gross] => 34650000
[vat] => 3465000
)
[5] => Array
(
[revision_no] => 0
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000003
[gross] => 34650000
[vat] => 3465000
)
[6] => Array
(
[revision_no] => 0
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 2132134923102931
[document_number] => 010.000-12.00000003
[gross] => 34650000
[vat] => 3465000
)
我应该如何在PHP中根据 revision_no
vendor_no
和 document_number
。然后对于那些具有相同的 vendor_no
和 document_number
的人只能使用最高$ revision_no
。
What should I do in PHP to pick uniques based on revision_no
vendor_no
and document_number
. And then for those having the same vendor_no
and document_number
take only the one having the highest revision_no
.
所以结果将如下:
[2] => Array
(
[revision_no] => 2
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000001
[gross] => 34650000
[vat] => 3465000
)
[3] => Array
(
[revision_no] => 1
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000002
[gross] => 34650000
[vat] => 3465000
)
[5] => Array
(
[revision_no] => 0
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 311560353071000
[document_number] => 010.000-12.00000003
[gross] => 34650000
[vat] => 3465000
)
[6] => Array
(
[revision_no] => 0
[invoice_type] => PK
[transaction_id] => 5
[vendor_number] => 2132134923102931
[document_number] => 010.000-12.00000003
[gross] => 34650000
[vat] => 3465000
)
推荐答案
$output = array_reduce(
$input,
function (array $carry, array $item) {
// generate the key to identify the duplicates
// Add $item['gross'] if needed
$key = $item['vendor_number'].'/'.$item['document_number'];
// If this is the first appearance of the key
// then add the value to the partial list and return it
if (! isset($carry[$key])) {
$carry[$key] = $item;
return $carry;
}
// A previous revision exists
// Check values in $item against those already existing in the list
$old = $carry[$key];
if ($old['revision_no'] < $item['revision_no']) {
// This is a new revision, replace the old one
$carry[$key] = $item;
}
// Return $carry (updated or not)
return $carry;
},
array()
);
此代码不保留原始数组中的键。保存密钥的解决方案可以使用 array_walk()
。
This code does not preserve the keys from the original array. A solution that preserves the keys can be implemented in a similar fashion using array_walk()
.
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