PHP - recursive function foreach - php

Question

I would to create a recursive function in order to retrieve data from an array and to organize then.
However I have some difficulties to create the right logic. The principle must be apply to any sub level until it ends or nothing is found.
I want to prevent this kind of code by repeating a foreach inside a foreach...:
$cats = get_categories($args);
$categories = array();
foreach($cats as $cat){
$parent = $cat->category_parent;
if ($parent) {
$categories['child'][$parent][$cat->cat_ID] = $cat->name;
} else {
$categories['parent'][$cat->cat_ID] = $cat->name;
}
}
}
if (isset($categories['parent']) && !empty($categories['parent'])) {
foreach($categories['parent'] as $id => $cat){
$new_cats[$id]['title'] = $cat;
if (isset($categories['child'][$id])) {
foreach($categories['child'][$id] as $child_id => $child_cat){
$new_cats[$child_id]['title'] = $child_cat;
$new_cats[$child_id]['parent_id'] = $id;
if (isset($categories['child'][$child_id])) {
foreach($categories['child'][$child_id] as $sub_child_id => $sub_child_cat){
$new_cats[$sub_child_id]['title'] = $sub_child_cat;
$new_cats[$sub_child_id]['parent_id'] = $child_id;
}
}
}
}
}
}
}

Answer 1

May be this code help you to get idea for formatting your desired array format.
<?php
// Main function
function BuildArr($arr)
{
$formattedArr = array();
if(!empty($arr))
{
foreach($arr as $val)
{
if($val['has_children'])
{
$returnArr = SubBuildArr($val['children']); // call recursive function
if(!empty($rs))
{
$formattedArr[] = $returnArr;
}
}
else
{
$formattedArr[] = $val;
}
}
}
return $formattedArr;
}
// Recursive Function( Build child )
function SubBuildArr($arr)
{
$sub_fortmattedArr = array();
if(!empty($arr))
{
foreach($arr as $val)
{
if($val['has_children'])
{
$response = SubBuildArr($val['children']); // call recursive
if(!empty($response))
{
$sub_fortmattedArr[] = $response;
}
}
else
{
$sub_fortmattedArr[] = $arr;
}
}
return $sub_fortmattedArr;
}
}
?>
I use this code for my previous project for generating categories that upto n-th level