Wilber Group Code Challenge

challenge.php

$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"}]}';

class priority extends SplHeap
{
    public function compare($array1, $array2)
    {
        if ($array1['age'] > $array2['age']) {
            return 1;
        } elseif ($array1['age'] == $array2['age']) {
            return 0;
        } else {
            return -1;
        }
    }
}

$decendingOrder = [];
$priority = new priority();
$peopArr = json_decode($people, true);
foreach ($peopArr['data'] as $person) {
    $priority->insert($person);
}
while ($priority->valid()) {
    $p = $priority->current();
    $fname = $p['first_name'] ?? '';
    $lname = $p['last_name'] ?? '';
    $p['name'] = $fname . ' ' . $lname;
    $decendingOrder[] = $p;
    $priority->next();
}
$emailAddresses = array_column($decendingOrder, 'email');
print_r($decendingOrder);
print_r($emailAddresses);