allroundexperts

<?php

require_once('./json.php'); //Importing the data file assuming it lies in the same directory as challenge.php file

$peopleArray = json_decode($people)->data;

//Making an array with all the emails and adding an extra property to $peopleArray
foreach($peopleArray as $key => $peopleObj){
    $emails[] = $peopleObj->email;
    $peopleObj->name = $peopleObj->first_name.' '.$peopleObj->last_name;