- var_dump: documentation ( source)
- array_intersect_key: documentation ( source)
- array_values: documentation ( source)
- implode: documentation ( source)
- array_filter: documentation ( source)
- array_diff_key: documentation ( source)
<?php
$profileSubscriptions = ['one' => false, 'two' => true];
$lookup = ['one' => 'subscription', 'two' => 'marketing'];
$subscriptions = array_filter($profileSubscriptions);
$lists = array_values(array_filter(array_intersect_key($lookup, $subscriptions)));
var_dump($lists);
$diff = array_diff_key($subscriptions, $lists);
echo 'Subscriptions do not exist for ' . implode(', ', $diff);