获取php多维数组的和

Question

我希望将所有键的总和存储在一个数组中，这是我的示例代码

<?php
// Sample data
$category = (object) ['category_name' => '32459*1500*lab*1,32460*400*lab*1,32461*600*lab*1'];
// process
$category_sale_data = explode(',', $category->category_name);
foreach ($category_sale_data as $key => $value) {

list($sale_key, $sale_value) = explode('*', $value);
$category->sale_data[$sale_key][] = $sale_value;
//$category->sale_data_sum[$sale_key][] += $sale_value;
}
// display
print_r($category);

获取此输出工作示例->https://3v4l.org/NAKfb#v7.0.0

这里有望获得//$category->sale_data_sum[$sale_key][]+=$sale_value；

我预计会输出这样的

stdClass Object
(
[category_name] => 32459*1500*lab*1,32460*400*lab*1,32461*600*lab*1
[sale_data] => Array
(
[32459] => Array
(
[0] => 1500
)
[32460] => Array
(
[0] => 400
)
[32461] => Array
(
[0] => 600
)
)
[sale_data_sum] => 2500
)

Answer 1

只需执行以下操作：

$category->sale_data_sum = 0; // initiate key
foreach ($category_sale_data as $key => $value) {
list($sale_key, $sale_value) = explode('*', $value);
$category->sale_data[$sale_key][] = $sale_value;
$category->sale_data_sum += $sale_value; // add each sale value
}

Answer 2

$category = [ 'category_name' => '32459*1500*lab*1,32460*400*lab*1,32461*600*lab*1' ];
// category_name
$result['category_name'] = $category['category_name'];
// sale_data
$splitted = preg_split('/[*,]/', $category['category_name']);
for($i = 0; $i < count($splitted); $i += 4) {
$result['sale_data'][$splitted[$i]] = $splitted[$i + 1];
}
// sale_data_sum
$result['sale_data_sum'] = array_sum($result['sale_data']);
print_r($result);

Answer 3

试试这个

<?php
// Sample data
$category = (object) ['category_name' => '32459*1500*lab*1,32460*400*lab*1,32461*600*lab*1'];
// process
$category_sale_data = explode(',', $category->category_name);
foreach ($category_sale_data as $key => $value) {

list($sale_key, $sale_value) = explode('*', $value);
$category->sale_data[$sale_key][] = $sale_value;
//$category->sale_data_sum[$sale_key][] += $sale_value;
}

function sum($carry, $item)
{
$carry += array_values($item)[0];
return $carry;
}

$a = array_reduce(array_values($category->sale_data), "sum"); 

var_dump($a);

或

<?php
// Sample data
$category = (object) ['category_name' => '32459*1500*lab*1,32460*400*lab*1,32461*600*lab*1'];
// process
$category_sale_data = explode(',', $category->category_name);
$category->sale_data_sum = null;
foreach ($category_sale_data as $key => $value) {

list($sale_key, $sale_value) = explode('*', $value);
$category->sale_data[$sale_key][] = $sale_value;
$category->sale_data_sum += $sale_value;
}
// display
print_r($category);