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