This is the response to Wilber Group PHP developer challenge

wilber_response.php

<?php
/**
     * Instructions:
     *
     * Given the above JSON, build a simple PHP script to import it.
     *
     * Your script should create two variables:
     *
     * - a comma-separated list of email addresses
     * - the original data, sorted by age descending, with a new field on each record
     *   called "name" which is the first and last name joined.
     *
     * Please deliver your code in either a GitHub Gist or some other sort of web-hosted code snippet platform.
     */
    
    $people = '{"data":[{"first_name":"jake","last_name":"bennett","age":31,"email":"jake@bennett.com","secret":"VXNlIHRoaXMgc2VjcmV0IHBocmFzZSBzb21ld2hlcmUgaW4geW91ciBjb2RlJ3MgY29tbWVudHM="},{"first_name":"jordon","last_name":"brill","age":85,"email": "jordon@brill.com","secret":"YWxidXF1ZXJxdWUuIHNub3JrZWwu"},]}';
    $people = rtrim($people, ',');

    $last_comma = strrpos($people, ',');
    //var_dump($last_comma);
    $people = substr_replace($people, '', $last_comma, 1);

    // json decode string into associative array.
    $result = json_decode($people, true);

    $email_addresses = '';
    $sorted_arr = array();
    foreach ($result['data'] as $data) {
        $email_addresses .= $data['email'] . ', ';
        $temp_arr = $data;
        $temp_arr['name'] = $data['first_name'] . ' ' . $data['last_name'];
        array_push($sorted_arr, $temp_arr);
    }

    uasort($sorted_arr, function($a, $b){
        if ($a['age'] == $b['age']) {
            return 0;
        }

        return ($a['age'] < $b['age']) ? -1 : 1 ;
    });

    // remove the last_comma
    $email_addresses = substr_replace($email_addresses, '', strrpos(trim($email_addresses), ','), 1);

    print_r($email_addresses);
    echo "<br>";
    print_r($sorted_arr);