How to recursively remap array in PHP? - php

Question

How to recursively remap children to nodes? I tried writing recursive function, but it only runs one iteration. Array map - http://php.net/manual/en/function.array-map.php would only run for single dimension
I'm using nested sets model https://github.com/etrepat/baum#getting-started Input is generated by dumping all hierarchy
$array = Category::where('name', '=', 'All')->first()->getDescendantsAndSelf()->toHierarchy()->toArray();
/* Input */
$array = array(
'category_id' => 0,
'children' => array(
array(
'category_id' => 1,
'children' => array(
'category_id' => 2,
'children' => array(
'category_id' => 3,
)
)
),
array(
'category_id' => 4,
'children' => array(
'category_id' => 5,
'children' => array(
'category_id' => 6,
)
)
)
)
);
Output should be
/*
$array = array(
'category_id' => 0,
'nodes' => array(
array(
'category_id' => 1,
'nodes' => array(
'category_id' => 2,
'nodes' => array(
'category_id' => 3,
)
)
),
array(
'category_id' => 4,
'nodes' => array(
'category_id' => 5,
'nodes' => array(
'category_id' => 6,
)
)
)
)
);*/
function remap($items){
if(!empty($items['children'])){
$items['nodes'] = $items['children'];
unset($items['children']);
return remap($items['nodes']);
}
else{
return $items;
}
}
print_r(remap($array));

Answer 1

A bit complicated couse , childrens content variates by depth
function remap(array &$items){
if(array_key_exists('children',$items)){
$items['nodes'] = $items['children'];
unset($items['children']);
if(array_key_exists('children',$items['nodes'])){
$items['nodes']['nodes'] = $items['nodes']['children'];
unset($items['nodes']['children']);
}
foreach ($items['nodes'] as &$x) {
if (is_array($x)) {
remap($x);
}
}
}
else{
return $items;
}
}
remap($array);
print_r($array);

Answer 2

This function will change the children keys to nodes.
function remap($items) {
$result = array();
foreach ($items as $key => $value) {
if ($key == 'children') {
$result['nodes'] = remap($value);
} else {
$result[$key] = $value;
}
}
return $result;
}
$new_array = remap($array);
After your comment, though, it seems like it would be easier to create an accessor that maps children to nodes in your Eloquent model and use that in the select that gets your collection.