(
[id] => 1
[name] => some data.
[emoji] => 🐕
[parent_id] =>
[children] => Array
(
[0] => Array
(
[id] => 2
[name] => Food
[emoji] => 🥩
[parent_id] => 1
[children] => Array
(
)
)
[1] => Array
(
[id] => 3
[name] => some other data
[emoji] => 😌
[parent_id] => 1
[children] => Array
(
[0] => Array
(
[id] => 4
[name] => Massages
[emoji] => 💆
[parent_id] => 3
[children] => Array
(
)
)
[1] => Array
(
[id] => 5
[name] => Games
[emoji] => 🎾
[parent_id] => 3
[children] => Array
(
)
)
)
)
)
)
)
预期的结果应为：
0] => Array
(
[id] => 1
[name] => Rusty Corp.
[emoji] => 🐕
[parent_id] =>
)
[1] => Array
(
[id] => 2
[name] => Food
[emoji] => 🥩
[parent_id] => 1
)
[2] => Array
(
[id] => 3
[name] => Canine Therapy
[emoji] => 😌
[parent_id] => 1
)
[3] => Array
(
[id] => 4
[name] => Massages
[emoji] => 💆
[parent_id] => 3
)
[4] => Array
(
[id] => 5
[name] => Games
[emoji] => 🎾
[parent_id] => 3
)
i尝试了不同的方法，例如Array_Merge或自定义扁平功能，但无法确定预期结果，任何建议？
Edit：
这是我的扁平功能：
private function flatten_array( array $array ) {
$return = array();
array_walk_recursive(
$array,
function( $a ) use ( &$return ) {
$return[] = $a;
}
);
return $return;
}
HERRE是一个会使数组变平的递归函数，它不会考虑根元素上的null值。而且，扁平的数组将从数组和根部元素开始时最嵌套的元素开始。
parent_id