我有以下数组。 parentId关键很重要！
Array
(
[0] => Array
(
[id] => 1
[name] => Home
[parentId] =>
[children] =>
)
[1] => Array
(
[id] => 2
[name] => About
[parentId] =>
[children] =>
)
[2] => Array
(
[id] => 3
[name] => Services
[parentId] => 2
[children] =>
)
)
下面是我的expected数组结果。你将看到 Services 在 id 为2和服务 parentId 为2的About下
Array
(
[0] => Array
(
[id] => 1
[name] => Home
[parentId] =>
[children] =>
)
[1] => Array
(
[id] => 2
[name] => About
[parentId] =>
[children] => Array
(
[0] => Array
(
[id] => 3
[name] => Services
[parentId] => 2
[children] =>
)
)
)
)
我可以用array_walk或array_map轻松foreach做到这一点。
我只是想知道是否有任何function可以在没有foreach loop的情况下连接像 SQL JOIN 这样的数组索引？
所以在我的数组中：id = parentId
试试这个库
https://github.com/erdalceylan/array-join
数据
$users = [
["id"=>1, "nick"=>"erdal"],
(object)["id"=>2, "nick"=>"furkan" ],
["id"=>3, "nick"=>"huseyin"],
["id"=>4, "nick"=>"hümeyra" ],
["id"=>5, "nick"=>"tuba" ],
];
$items = [
["user_id"=>1, "item"=>"kaban", "mmx" => "mmx1"],
["user_id"=>1, "item"=>"çorap", "mmx" => "mmx2"],
["user_id"=>1, "item"=>"çorap", "mmx" => "mmx3"],
(object)["user_id"=>1, "item"=>"çorap", "mmx" => "mmx4"],
["user_id"=>1, "item"=>"çorap", "mmx" => "mmx5"],
["user_id"=>1, "item"=>"çorap", "mmx" => "mmx6"],
["user_id"=>2, "item"=>"araba", "mmx" => "mmx7"],
(object)["user_id"=>9, "item"=>"ev", "mmx" => "mmx8"],
["user_id"=>10, "item"=>"yat", "mmx" => "mmx9"],
];
$foods = [
["user_id"=>1, "food"=>"iskender"],
["user_id"=>2, "food"=>"adana"],
];
$texts = [
["user_id"=>1, "text"=>"merhaba"],
["user_id"=>15, "text"=>" hi"],
];
用法
$instance = 'ArrayJoin'Builder::newInstance()
->select("a.id", "a.nick", "b.item", "d.food")
->from($users, "a")
->innerJoin($items, "b", new 'ArrayJoin'On("a.id = b.user_id"))
->leftJoin($texts, "c", new 'ArrayJoin'On("a.id = c.user_id"))
->rightJoin($foods, "d", new 'ArrayJoin'On("b.user_id = d.user_id"))
->where("a.id", "a.text", function ($fieldFirs, $fieldSecond){
return $fieldFirs < 10;
})
->limit(2)
->offset(1)
->setFetchType('ArrayJoin'Builder::FETCH_TYPE_OBJECT);
$instance->execute();
输出
array (
stdClass::__set_state(array(
'id' => 1,
'nick' => 'erdal',
'item' => 'çorap',
'food' => 'iskender',
)),
stdClass::__set_state(array(
'id' => 1,
'nick' => 'erdal',
'item' => 'çorap',
'food' => 'iskender',
)),
)
数组
就像在图像中一样
。 [1][children][0] => Array
(
[id] => 3
[name] => Services
[parentId] => 2
[children] =>
)
我个人会用两个表来做，然后使用一个表根据键引用另一个表。