我需要为PHP多维数组的所有子代分配父代ID。
Array
(
[expanded] => 1
[key] => root_1
[title] => root
[children] => Array
(
[0] => Array
(
[folder] => 1
[key] => 34
[title] => YAY PROJECTS
)
[1] => Array
(
[expanded] => 1
[folder] => 1
[key] => 6
[title] => Grand Designs Episodes
[children] => Array
(
[0] => Array
(
[folder] => 1
[key] => 8
[title] => AU Episodes
)
[1] => Array
(
[expanded] => 1
[folder] => 1
[key] => 7
[title] => UK Episodes
[children] => Array
(
[0] => Array
(
[folder] =>
[key] => 9
[title] => Start something
)
[1] => Array
(
[folder] =>
[key] => 2
[title] => Grand Designs Season 10
)
)
)
)
)
[2] => Array
(
[expanded] => 1
[folder] => 1
[key] => 5
[title] => Animations
[children] => Array
(
[0] => Array
(
[folder] =>
[key] => 4
[title] => Futurama Episode 191
)
[1] => Array
(
[folder] =>
[key] => 3
[title] => Miniscule Series 5 Ep 1
)
[2] => Array
(
[folder] =>
[key] => 1
[title] => The Simpsons Episode 459
)
)
)
[3] => Array
(
[folder] => 1
[key] => 11
[title] => Test Folder
)
[4] => Array
(
[folder] => 1
[key] => 10
[title] => Testing
)
)
)
起初我以为这是微不足道的,但是我的解决方案很快就崩溃了,分配了错误的parent_id。
public function generateParentIds(array $input, $parentId = 0)
{
$return = [];
foreach ($input as $key => $value) {
if (is_array($value)) {
$value = $this->generateParentIds($value, $parentId);
if (isset($value['children'])) {
$parentId = $value['key'];
}
if (!is_int($key)) {
$return['parent_id'] = $parentId;
}
}
$return[$key] = $value;
}
return $return;
}
我不确定发生了什么,我做了很多研究,但找不到任何示例,因此,我非常感谢您的帮助。
答案 0 :(得分:1)
假设每个孩子都应该获得直系父母的key
值作为其parent_id
,这应该做您想要的。请注意,它修改了数组($input
通过引用传递给函数,并且foreach循环使用对$child
的引用),而不是尝试合并返回的值。
function generateParentIds(&$input, $parentId = 0) {
$input['parent_id'] = $parentId;
if (isset($input['children'])) {
foreach ($input['children'] as &$child) {
generateParentIds($child, $input['key']);
}
}
}
generateParentIds($input);
输出内容太长,无法在此处显示,但是有一个demo at 3v4l.org