我有下面这样的多维数组，
$product = array(
"2e471a22b1b994a7cb3f3a40cee9fba2" => array (
"product" => 6004,
"unique_key" => 3a8a5cb029ee3b92cfc90de23e2329ab,
"product_id" => 51,
"line_total"=>99,
"quantity"=>1,
"data"=> array(
"id"=> 51,
"post"=>array(
"ID"=>51,
"post_title"=>"Prodcut four - control",
),
"price"=>99
)
),
"a7d0f813832ec8a2bf24269ff7145d0c" => array (
"product" => 6004,
"unique_key" => c30d1ca26d30aa3dc3c9aa04f0b585ce,
"product_id" => 51,
"line_total"=>99,
"quantity"=>1,
"data"=> array(
"id"=> 51,
"post"=>array(
"ID"=>51,
"post_title"=>"Prodcut four - control",
),
"price"=>99
)
)
);
需要删除基于"product_id"数组值的重复值，并根据产品数量增加数量值。注意：上面的数组也有"唯一键"，所以数组结果中需要任何一个唯一键。
Expected Result should be:
$resultproduct = array(
"2e471a22b1b994a7cb3f3a40cee9fba2" => array (
"product" => 6004,
"unique_key" => 3a8a5cb029ee3b92cfc90de23e2329ab,
"product_id" => 51,
"line_total"=>99,
"quantity"=>2,
"data"=> array(
"id"=> 51,
"post"=>array(
"ID"=>51,
"post_title"=>"Prodcut four - control",
),
"price"=>99
)
));
中eval.in的工作代码
我试图让代码更容易理解，这样就有了比绝对需要的更多的变量和代码行。
说明：
1） 需要使用原始product数组索引中的一个作为输出表键，例如产品51的"2e471a22b1b994a7cb3f3a40ce9fba2"。
2） 它需要快速将输入productId与输出键关联起来。因此，我使用了一个查找表ProductIdList，它将productId与output关键字相匹配。
然后是两个阶段的查找，以找到输出中的条目并向其添加数量
代码：
// create a product_id => first key table
$productIdList = array();
// output...
$productTotal = array();
foreach ($product as $origIndex => $entry) {
$curProductId = $entry['product_id'];
// check product_id exists in the lookup...
if (isset($productIdList[$curProductId])) { // add to the total...
$productTotalIndex = $productIdList[$curProductId];
$productTotal[$productTotalIndex]['quantity'] += $entry['quantity'];
}
else { // add the entry to the output and the productIdList...
$productIdList[$curProductId] = $origIndex;
$productTotal[$origIndex] = $entry;
}
}
输出：总计数组：
Array
(
[2e471a22b1b994a7cb3f3a40cee9fba2] => Array
(
[product] => 6004
[unique_key] => 3a8a5cb029ee3b92cfc90de23e2329ab
[product_id] => 51
[line_total] => 99
[quantity] => 2
[data] => Array
(
[id] => 51
[post] => Array
(
[ID] => 51
[post_title] => Prodcut four - control
)
[price] => 99
)
)
[test02] => Array
(
[product] => 6664
[unique_key] => c30d1ca26d30aa3dc3c9aa04f0b585ce
[product_id] => 666
[line_total] => 99
[quantity] => 579
[data] => Array
(
[id] => 666
[post] => Array
(
[ID] => 666
[post_title] => Prodcut 666 - control
)
[price] => 99
)
)
)
原始密钥列表的productId：
array (size=2)
51 => string '2e471a22b1b994a7cb3f3a40cee9fba2' (length=32)
666 => string 'test02' (length=6)
您需要在每个产品上循环，并使用product_id作为新数组的键。这会在进行过程中添加数量，因此应该适用于除1以外的任何数量。
$result = [];
foreach ($product as $p)
{
if (isset($result[$p['product_id']]))
{
$result[$p['product_id']]['quantity']+= $p['quantity'];
}
else
{
$result[$p['product_id']] = $p;
}
}
print_r($result);