在下面的数组中，最深的数组 Sub Belt 有4个项目。我要将这4个项目添加到其父类别皮带，因此皮带的计数值应为6。
现在帽子，皮带有2、6个项目，父类别为附件。因此，附件的计数值应为8。
T恤，连帽，附件分别有5、3、8件。因此，父类别服装的count元素的值应为16。
Array
(
[16] => Array
(
[id] => 16
[name] => Clothing
[count] => 0
[parent_id] => 0
[children] => Array
(
[17] => Array
(
[id] => 17
[name] => Tshirts
[count] => 5
[parent_id] => 16
)
[18] => Array
(
[id] => 18
[name] => Hoodies
[count] => 3
[parent_id] => 16
)
[19] => Array
(
[id] => 19
[name] => Accessories
[count] => 0
[parent_id] => 16
[children] => Array
(
[31] => Array
(
[id] => 31
[name] => Hats
[count] => 2
[parent_id] => 19
)
[32] => Array
(
[id] => 32
[name] => Belts
[count] => 2
[parent_id] => 19
[children] => Array
(
[36] => Array
(
[id] => 36
[name] => Sub Belt
[count] => 4
[parent_id] => 32
)
)
)
)
)
)
)
[20] => Array
(
[id] => 20
[name] => Music
[count] => 2
[parent_id] => 0
)
[21] => Array
(
[id] => 21
[name] => Decor
[count] => 3
[parent_id] => 0
)
)
结果数组应如下所示：
Array
(
[16] => Array
(
[id] => 16
[name] => Clothing
[count] => 16
[parent_id] => 0
[children] => Array
(
[17] => Array
(
[id] => 17
[name] => Tshirts
[count] => 5
[parent_id] => 16
)
[18] => Array
(
[id] => 18
[name] => Hoodies
[count] => 3
[parent_id] => 16
)
[19] => Array
(
[id] => 19
[name] => Accessories
[count] => 8
[parent_id] => 16
[children] => Array
(
[31] => Array
(
[id] => 31
[name] => Hats
[count] => 2
[parent_id] => 19
)
[32] => Array
(
[id] => 32
[name] => Belts
[count] => 6
[parent_id] => 19
[children] => Array
(
[36] => Array
(
[id] => 36
[name] => Sub Item
[count] => 4
[parent_id] => 32
)
)
)
)
)
)
)
[20] => Array
(
[id] => 20
[name] => Music
[count] => 2
[parent_id] => 0
)
[21] => Array
(
[id] => 21
[name] => Decor
[count] => 3
[parent_id] => 0
)
)
答案 0 :(得分：0)
我从这里有了一个主意，http://php.net/manual/en/class.recursiveiteratoriterator.php#120131
RecusiveIteratorIterator与RecursiveArrayIterator类结合使用可用于替换任何深度的多维数组上的数组值。
$array_iterator = new RecursiveArrayIterator($tree);
$recursive_iterator = new RecursiveIteratorIterator($array_iterator, RecursiveIteratorIterator::CHILD_FIRST);
foreach ($recursive_iterator as $key => $value) {
if (is_array($value) && array_key_exists('children', $value)) {
$array_with_children = $value;
$array_with_children_count = $array_with_children['count'];
foreach ($array_with_children['children'] as $children) {
$array_with_children_count = $array_with_children_count + $children['count'];
}
$array_with_children['count'] = $array_with_children_count;
$current_depth = $recursive_iterator->getDepth();
for ($sub_depth = $current_depth; $sub_depth >= 0; $sub_depth--) {
// Get the current level iterator
$sub_iterator = $recursive_iterator->getSubIterator($sub_depth);
// If we are on the level we want to change, use the replacements
// ($array_with_children) other wise set the key to the parent
// iterators value
if ($sub_depth === $current_depth) {
$value = $array_with_children;
} else {
$value = $recursive_iterator->getSubIterator(($sub_depth + 1))->getArrayCopy();
}
$sub_iterator->offsetSet($sub_iterator->key(), $value);
}
}
}
print_r($recursive_iterator->getArrayCopy());
请参见gist。