How to add item to an object in php - php

Question

I have a nested object which is generated by a base data in a function. the data generated is several levels deep (data_tree)
To enter each children I use a recursive function.
What I want is to add the data of the children2 item to children and remove children2
Next I show the data_tree in JSON format to get an idea of ​​how the structure is. remember that the data_tree is an object
{
"data_tree": [
{
"code":"PE",
"country":"Peruvian",
"language" :"spanish",
"children":[
{
"code": "DEP1" ,
"region":"Tumbes",
"children": [
{
"code": "PRO1",
"province":"Contralmirante Villar"
}
],
"children2": [
{
"code": "PRO2",
"province":"Zarumilla "
}
]
},
{
"code": "DEP2" ,
"region":"Piura",
"children": [],
"children2": [
{
"code": "PRO4",
"province" :"Paita"
},
{
"code": "PRO5",
"province":"Sullana"
}
]
},
{
"code": "DEP3" ,
"region":"Lambayeque"
}
],
"children2":[
{
"code": "DEP4" ,
"region":"La Libertad"
},
{
"code": "DEP5" ,
"region":"Lima"
}
]
},
{
"code":"EC"
"country":"Ecuador",
"language" :"spanish",
"children":[
{
"code": "4" ,
"province":"Quito"
},
{
"code": "5" ,
"province":"Guayaquil"
}
],
"children2":[]
}
]
}
the recursive function i use is: if it has children it keeps iterating.
$traverse = function ($data_tree) use (&$traverse) {
foreach ($data_tree as &$node) {
if (empty($node->children)) { //if the children is empty
unset($node->children); //I remove the children to add it with the data of children2
$node->children =$node->children2;
unset($node->children2);//I delete children2
}else{
//in case I have data, how do I add the data from dechildren2 to children?
}
$traverse($node->children);
}
};
$traverse($data_tree);
return $data_tree;

Answer 1

All problem solved using json decode mean in associative array
$data_json='[{"children":[],"children2":[{"children":[],"children2":[{"code":"PRO1","children":[],"children2":[{"code":"PRO1"}]}]}]},{"children":[],"children2":[{"children":[{"code":"PRO1","children":[],"children2":[{"code":"PRO1"}]}]}]}]';
//$data_tree=;
$data_tree =json_decode($data_json,true);
// var_dump($data_tree);
$traverse = function (&$data_tree) use (&$traverse) {
foreach ($data_tree as &$node) {
// var_dump($node);
if (empty($node['children']) && !empty($node['children2'])) { //if the children is empty
// var_dump($node);
$node['children'] =$node['children2'];
unset($node['children2']);//I delete children2
}else{
//in case I have data, how do I add the data from dechildren2 to children?
}
if(isset($node['children'])){
$traverse($node['children']);
}
if(isset($node['children2'])){
$traverse($node['children2']);
}
}
};
$traverse($data_tree);
Output
[{"children":[{"children":[{"code":"PRO1","children":[{"code":"PRO1"}]}]}]},{"children":[{"children":[{"code":"PRO1","children":[{"code":"PRO1"}]}]}]}]