PHP array_dot() - Flatten multidimensional array

<?php

$json = '{"id":"a9697c47-dcc6-46ad-8778-000000000000","result":"A","statedIp":"10.8.1.1","trackingNumber":202020202020202020,"details":{"device":{"alias":101010101010101010,"blackboxMetadata":{"age":3543856,"timestamp":"2020-07-24T04:45:18Z"},"browser":{"cookiesEnabled":true,"configuredLanguage":"EN-US,EN;Q=0.9,MS;Q=0.8","language":"EN-US","type":"CHROME","timezone":"-480","version":"83.0.4103.116"},"firstSeen":"2020-06-30T13:12:04.240Z","isNew":false,"os":"WINDOWS NT 10.0","screen":"1440X2560","type":"WINDOWS"},"statedIp":{"address":"10.8.10.00","source":"subscriber"},"realIp":{"address":"118.100.10.10","isp":"TM NET  INTERNET SERVICE PROVIDER","ipLocation":{"city":"KUALA LUMPUR","country":"MALAYSIA","countryCode":"MY","latitude":3.656210,"longitude":125.68690,"region":"KUALA LUMPUR"},"parentOrganization":"TMNST","source":"nandos"},"ruleResults":{"score":0,"rulesMatched":0}}}';
$json = json_decode($json, true);

print_r(array_dot($json));

/**
 * Flatten multidimensional array into single array, by dot all keys to it's value.
 * Inspired by Laravel.
 *
 * @version PHP 5.3 Safe.
 *
 * @param array  $array
 * @param string $prefix
 * @param string $glue
 *
 * @return array{string: mixed}
 */
function array_dot($array, $prefix = '', $glue = '.')
{
    $result = array();

    foreach ($array as $key => $value) {
        if( is_array($value) ) {
            $result = $result + array_dot($value, $prefix . $key . $glue);
        }
        else {
            $result[$prefix . $key] = $value;
        }
    }

    return $result;
}

/*
Array
(
    [id] => a9697c47-dcc6-46ad-8778-000000000000
    [result] => A
    [statedIp] => 10.8.1.1
    [trackingNumber] => 202020202020202020
    [details.device.alias] => 101010101010101010
    [details.device.blackboxMetadata.age] => 3543856
    [details.device.blackboxMetadata.timestamp] => 2020-07-24T04:45:18Z
    [details.device.browser.cookiesEnabled] => 1
    [details.device.browser.configuredLanguage] => EN-US,EN;Q=0.9,MS;Q=0.8
    [details.device.browser.language] => EN-US
    [details.device.browser.type] => CHROME
    [details.device.browser.timezone] => -480
    [details.device.browser.version] => 83.0.4103.116
    [details.device.firstSeen] => 2020-06-30T13:12:04.240Z
    [details.device.isNew] =>
    [details.device.os] => WINDOWS NT 10.0
    [details.device.screen] => 1440X2560
    [details.device.type] => WINDOWS
    [details.statedIp.address] => 10.8.10.00
    [details.statedIp.source] => subscriber
    [details.realIp.address] => 118.100.10.10
    [details.realIp.isp] => TM NET  INTERNET SERVICE PROVIDER
    [details.realIp.ipLocation.city] => KUALA LUMPUR
    [details.realIp.ipLocation.country] => MALAYSIA
    [details.realIp.ipLocation.countryCode] => MY
    [details.realIp.ipLocation.latitude] => 3.65621
    [details.realIp.ipLocation.longitude] => 125.6869
    [details.realIp.ipLocation.region] => KUALA LUMPUR
    [details.realIp.parentOrganization] => TMNST
    [details.realIp.source] => nandos
    [details.ruleResults.score] => 0
    [details.ruleResults.rulesMatched] => 0
)
 */