Online PHP editor | output for A3ck7

<?php $json = '{ "old": { "id": 1, "hash": "19f149b6-f7e2-4d61-b3c5-d46ebc92f681", "car_id": 2, "comments": "uwagi", "driver_id": 1, "address_to": "adres dostawy", "carrier_id": 22, "company_id": 1, "created_at": "2022-04-14T09:07:41.000000Z", "data_start": "2022-04-01", "deleted_at": null, "updated_at": "2022-04-14T09:07:41.000000Z", "carrier_nip": "728-597-9477", "data_finish": "2022-04-04", "address_from": "adres wyjazdu", "carrier_city": "Lake Emersonville", "carrier_name": "Satterfield, Lebsack and O\'Conner", "order_number": "Numer zlecenia", "speed_number": "Numer zlecenia speed - spedycja", "carrier_email": "mattie50@gmail.com", "carrier_phone": "347.731.2768 x1508", "dispatcher_id": 3, "carrier_street": "6342 Pollich Crossroad", "selected_files": "[7,8,9]", "transport_type": 2, "deliver_comments": null, "transport_status": 3, "is_neutral_option": 2, "selected_products": "[1,3]", "transport_content": "kontakt", "delivery_signature": null, "selected_documents": "[5]", "carrier_postal_code": "36804-7962", "hidden_carrier_data": 0, "delivery_name_surname": null, "delivery_signature_binary": null, "disable_change_status_driver": 0 }, "attributes": { "id": 1, "hash": "19f149b6-f7e2-4d61-b3c5-d46ebc92f681", "car_id": 2, "comments": "uwagi", "driver_id": 1, "address_to": "adres dostawy", "carrier_id": 22, "company_id": 1, "created_at": "2022-04-14T09:07:41.000000Z", "data_start": "2022-04-01", "deleted_at": null, "updated_at": "2022-04-14T09:09:08.000000Z", "carrier_nip": "728-597-9477", "data_finish": "2022-04-04", "address_from": "adres wyjazdu", "carrier_city": "Lake Emersonville", "carrier_name": "Satterfield, Lebsack and O\'Conner", "order_number": "Numer zlecenia", "speed_number": "Numer zlecenia speed - spedycja", "carrier_email": "mattie50@gmail.com", "carrier_phone": "347.731.2768 x1508", "dispatcher_id": 4, "carrier_street": "6342 Pollich Crossroad", "selected_files": "[7,8,9]", "transport_type": 2, "deliver_comments": null, "transport_status": 3, "is_neutral_option": 2, "selected_products": "[1,3,2]", "transport_content": "kontakt", "delivery_signature": null, "selected_documents": "[5,6,4]", "carrier_postal_code": "36804-7962", "hidden_carrier_data": 0, "delivery_name_surname": null, "delivery_signature_binary": null, "disable_change_status_driver": 0 } }'; $array = \json_decode($json, true); $diff = \array_diff($array['old'], $array['attributes']); var_dump($diff);