我已经试着让它工作了7.5个小时，但我的大脑已经融化了。
我有一个类似于以下的多维数组：
array (
'expanded' => true,
'key' => 'root_1',
'title' => 'root',
'children' =>
array (
0 =>
array (
'folder' => false,
'key' => '_1',
'title' => 'News',
'data' =>
array (
'id' => '3',
'parent_id' => 0,
),
),
1 =>
array (
'folder' => true,
'key' => '_2',
'title' => 'Animations',
'data' =>
array (
'id' => '5',
'parent_id' => '0',
),
'children' =>
array (
0 =>
array (
'folder' => false,
'key' => '_3',
'title' => 'The Simpsons',
'data' =>
array (
'id' => '1',
'parent_id' => '5',
),
),
1 =>
array (
'folder' => false,
'key' => '_4',
'title' => 'Futurama',
'data' =>
array (
'id' => '4',
'parent_id' => '5',
),
),
),
),
2 =>
array (
'folder' => true,
'key' => '_5',
'title' => 'Episodes',
'data' =>
array (
'id' => '6',
'parent_id' => '0',
),
'children' =>
array (
0 =>
array (
'folder' => true,
'key' => '_6',
'title' => 'UK Episodes',
'data' =>
array (
'id' => '7',
'parent_id' => '6',
),
'children' =>
array (
0 =>
array (
'folder' => false,
'key' => '_7',
'title' => 'Coupling',
'data' =>
array (
'id' => '2',
'parent_id' => '7',
),
),
),
),
1 =>
array (
'folder' => true,
'key' => '_8',
'title' => 'AU Episodes',
'data' =>
array (
'id' => '8',
'parent_id' => '6',
),
),
),
),
),
)
我需要搜索所有的子数组，并构建一个新的数组，返回每个子数组的id和parent_id，还根据它们在原始数组中的出现顺序来解释数组子数组的顺序。
输出需要以这样的方式结束：
Array
(
[0] => Array
(
[id] => 1
[parent_id] => 5
[order] => 1
)
[1] => Array
(
[id] => 2
[parent_id] => 7
[order] => 1
)
[2] => Array
(
[id] => 4
[parent_id] => 5
[order] => 2
)
)
我尝试过以下递归方法，但我的代码变得一团糟，甚至在我尝试设置项目顺序之前。
我还在stackoverflow上搜索了另一个我可以学习的例子，但我还没有找到任何东西。。。如果还有其他例子，请随时为我指明正确的方向。
我感谢您的帮助！
运行所有这些的一种非常简单的方法是在RecursiveArrayTerator上使用RecursiveIteratorIterator，取出'data'数组并按顺序添加键。
示例：
$array = []; // Your starting array with stuff in it.
$iterator = new RecursiveIteratorIterator(
new RecursiveArrayIterator($array),
RecursiveIteratorIterator::SELF_FIRST
);
$result = [];
foreach ($iterator as $key => $value) {
if (isset($value['data'])) {
$result[] = array_merge($value['data'], ['order' => $key]);
}
}
print_r($result);
输出：
Array
(
[0] => Array
(
[id] => 3
[parent_id] => 0
[order] => 0
)
[1] => Array
(
[id] => 5
[parent_id] => 0
[order] => 1
)
[2] => Array
(
[id] => 1
[parent_id] => 5
[order] => 0
)
[3] => Array
(
[id] => 4
[parent_id] => 5
[order] => 1
)
[4] => Array
(
[id] => 6
[parent_id] => 0
[order] => 2
)
[5] => Array
(
[id] => 7
[parent_id] => 6
[order] => 0
)
[6] => Array
(
[id] => 2
[parent_id] => 7
[order] => 0
)
[7] => Array
(
[id] => 8
[parent_id] => 6
[order] => 1
)
)
如果我理解您试图正确地做什么，下面的代码片段应该可以工作。在每个子数组中不需要顺序键，因为当您将新的数组索引插入$new_array时，会自动记录顺序键。
如果你还有其他问题，请告诉我。
$new_array = [];
$current_array = []; //with all your data
foreach($current_array['children'] as $array) {
$new_array[] = [
'id' => $array['data']['id'],
'parent_id' => $array['data']['parent_id'];
];
}