我有一个多级对象数据，其结构类似于下面的窗口。
我正在尝试
parents children树中所有嵌套的间接包值。预计最终结果将类似于：
[{"sum_direct": 600},{"sum_indirect": 3000}]
我需要帮助才能知道我做错了什么：
function sumDirect($c) {
if(count($c) > 0){
$sum = 0;
foreach ($c as $package) {
$sum += $package['package']['direct'];
}
} else {
$sum = 0;
}
return $sum;
}
function sumIndirect($c) {
if(count($c) > 0){
$sum = 0;
foreach ($c as $package) {
if(count($package['children']) > 0) {
foreach ($package['children'] as $children){
$sum += $children['indirect'];
$sum += sumIndirect($children);
}
}
}
} else {
$sum = 0;
}
return $sum;
}
样本输入：
{
"users": [{
"user_id": 2,
"ref_id": 1,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": [{
"user_id": 58,
"ref_id": 2,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 59,
"ref_id": 2,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 111,
"ref_id": 2,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 116,
"ref_id": 2,
"package": [{
"name": "Diamond"
},
{
"direct": 1000
},
{
"indirect": 500
}
],
"children": 0
},
{
"user_id": 119,
"ref_id": 2,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
}
]
},
{
"user_id": 100,
"ref_id": 1,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": [{
"user_id": 101,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 102,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 103,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 104,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 105,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 106,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 107,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 108,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 109,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 110,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
},
{
"user_id": 117,
"ref_id": 100,
"package": [{
"name": "Diamond"
},
{
"direct": 1000
},
{
"indirect": 500
}
],
"children": 0
},
{
"user_id": 129,
"ref_id": 100,
"package": [{
"name": "Diamond"
},
{
"direct": 1000
},
{
"indirect": 500
}
],
"children": 0
},
{
"user_id": 130,
"ref_id": 100,
"package": [{
"name": "Basic"
},
{
"direct": 200
},
{
"indirect": 100
}
],
"children": 0
}
]
}
]
}
在users.json处填写数据
答案 0 :(得分：0)
一种简单的方法可以基于一对foreach，每个嵌套另一个
$result['sum_direct'] = 0;
$result['sum_indirect'] = 0;
$myArray = json_decode($myJsonString, TRUE)
foreach($myArray['users'] as $value){
$result['sum_direct'] += $value['package']['direct'];
foreach($value['children']['package'] as $value2){
$result['sum_indirect'] += $value2['indirect'];
}
}
$jsonResult= json_encode($result);
答案 1 :(得分：0)
“父”直接值似乎不需要递归，因此可以通过直接foreach循环来完成。
“儿童”间接值需要递归。我选择使用(A2, A4) (A4, A3)访问数组中的每个“叶子节点”。这也将存储父母的间接值，因此我在(A1, A2)完成后减去了这些值。
代码：（Demo）
array_walk_recursive()使用查询中的数据输出：
array_walk_recursive()使用来自github的完整json输出：
$result['sum_direct'] = 0;
$result['sum_indirect'] = 0;
$parents_indirect = 0;
echo "<pre>";
$array = json_decode($json, true)['users'];
foreach ($array as $users) {
$result['sum_direct'] += $users['package'][1]['direct'];
$parents_indirect += $users['package'][2]['indirect'];
}
array_walk_recursive($array, function ($v, $k) use (&$result) {
if ($k === 'indirect') {
$result['sum_indirect'] += $v;
}
});
$result['sum_indirect'] -= $parents_indirect;
echo json_encode($result);