Compare multidimensional array with array of keys only - php

Question

I have a multidimensional array that looks like this:
"fields" => {
"name": "John"
"lastname": "Doe"
}
"data" => {
"person": array:2 [
0 => {
"adress": "foo"
"phone": "bar"
},
1 => {
"adress": "foo1"
"phone": "bar1"
}
]
}
Now I want to check that in this multidimensional array the follow keys exist so my second array to compare looks like this:
[
'fields' => [
"name",
"lastname",
],
"data" => [
"person" => [
"adress",
"phone"
]
],
]
Now here's what I've tried to compare the keys of my second array with the first array:
$result = array_diff_key($firstArray, array_flip($secondArray));
But this gives me an
array_flip(): Can only flip STRING and INTEGER values!
So I need a way to recursively flip the array or maybe I am doing it a bit wrong

Answer 1

I have a multidimensional array that looks like this ...
This is not an array, whatever you've done it now is amorphous trash, not an array not an json object.
$result = array_diff_key($firstArray, array_flip($secondArray));
array_diff_key() finds differences - unique keys
array_flip() replaces keys with values in the array
So I need a way to recursively flip the array or maybe I am doing it a bit wrong
Don't flip arrays, stop searching differences if you want to find the same keys.
You need at least 2 arrays (or objects) to comparison. If you will have 2 (not nested) arrays use
array_intersect_key($array1,$array2);
For nested arrays... you have to get all the keys and then compare.