PHP flatten a Multidimensional Array with keys - php

Question

I wrote some PHP code to line up the children of an array. I wrote a recursive function.
Everything is listed correctly one below the other, but some arrays do not have the "Name" key.
Does anyone have any idea how I can get it to show everyone's "Name" key?
My PHP Code:
$json = '[
{
"name": "A",
"children": [
{
"name": "B",
"children": [
{
"name": "C"
},
{
"name": "D",
"children": [
{
"name": "E"
},
{
"name": "F"
}
]
}
]
},
{
"name": "G"
}
]
},
{
"name": "H"
}
]';
header('Content-Type: application/json; charset=utf-8');
$json = json_decode($json, true);
function array_flatten($array, $prefix = '') {
$return = array();
foreach ($array as $key => $value) {
if (is_array($value) && array_key_exists("children", $value)){
$return = array_merge($return, array_flatten($value, $key));
}else if (is_array($value) && count($value) > 1){
foreach ($value as $keyA => $valueA) {
if (is_array($valueA) && array_key_exists("children", $valueA)){
$return = array_merge($return, array_flatten($valueA, $keyA));
}else{
$return[] = $valueA;
}
}
} else {
$return[] = $value;
}
}
return $return;
}
echo json_encode(array_flatten($json));
Current Result:
["A","B",{"name":"C"},"D",{"name":"E"},{"name":"F"},{"name":"G"},{"name":"H"}]
What I want:
[{"name":"A"},{"name":"B"},{"name":"C"},{"name":"D"},{"name":"E"},{"name":"F"},{"name":"G"},{"name":"H"}]

Answer 1

Here is a working code :
<?php
$json = '[
{
"name": "A",
"children": [
{
"name": "B",
"children": [
{
"name": "C"
},
{
"name": "D",
"children": [
{
"name": "E"
},
{
"name": "F"
}
]
}
]
},
{
"name": "G"
}
]
},
{
"name": "H"
}
]';
$json = json_decode($json, true);
function getArrayValuesRecursively(array $array){
$values = [];
foreach ($array as $value) {
if (is_array($value)) {
$values = array_merge(
$values,
getArrayValuesRecursively($value)
);
} else {
$values[] = ['name' => $value];
}
}
return $values;
}
echo json_encode(getArrayValuesRecursively($json));
Demo : https://3v4l.org/01Fla
Function getArrayValuesRecursively(array $array) is from Get all values from multidimensional array

Answer 2

here's my take on it:
$json = json_decode($json, true);
$names = get_names_of_people($json);
print(json_encode($names));
function get_names_of_people(array $people): array
{
$names = [];
foreach ($people as $person) {
foreach ($person as $key => $value) {
switch ($key) {
case 'name':
$names[] = [
'name' => $value,
];
break;
case 'children':
$names = array_merge($names, get_names_of_people($value));
}
}
}
return $names;
}

Answer 3

$array = json_decode($json, true);
$result = [];
array_walk_recursive($array, function ($value, $key) use(&$result) {
$result[][$key] = $value;
});