Recursively loop throught multidemensional array and keep track of parent array [duplicate] - php

Question

This question already has answers here:
PHP recursive array searching
(3 answers)
Closed 2 years ago.
That's a short version of the array I'm working with:
Array
(
[orders] => Array
(
[0] => Array
(
[id] => 123
[email] => somemail#mail.com
[line_items] => Array
(
[0] => Array
(
[id] => 456
)
)
)
)
)
I'd like to loop through it and echo out every $key => $value pair but keep track of the "parent" array.
When using this function:
function recursive($array, $level = 0){
foreach($array as $key => $value){
if(is_array($value)){
recursive($value, $level + 1);
} else{
echo $key . ": " . $value, "\n";
}
}
}
i get:
id: 123
email: somemail#mail.com
id: 456
and I would like to keep the parent array in front of the values so that i know which id is echoed out.
orders_0_id: 123
orders_0_email: somemail#mail.com
line_items_0_id: 456
Updated working solution:
function recursive($array, $level = -1,array $parentKey = []){
foreach($array as $key => $value){
$newKey = array_merge($parentKey, [$key]);
if(is_array($value)){
recursive($value, $level + 1, $newKey);
} else{
$parent = implode('_', $newKey);
echo $parent . ": " . $value, "\n";
}
}
}

Answer 1

I think this is what you are looking for, but it might be too much information.
Given this array:
$data = [
'orders' => [
[
'id' => 123,
'email' => 'text#example.com',
'line_items' => [
[
'id' => 356,
],
],
],
],
];
You can keep track of the parent key in an array:
function dumper(array $array, array $parentKey = [])
{
foreach ($array as $key => $value) {
$newKey = array_merge($parentKey, [$key]);
if (is_array($value)) {
dumper($value, $newKey);
} else {
$s = implode('_', $newKey) . ": " . $value . "\n";
echo $s . PHP_EOL;
}
}
}
dumper($data);
This produces:
orders_0_id: 123
orders_0_email: text#example.com
orders_0_line_items_0_id: 356