Online PHP editor | refs for 5GTu5

<?php $subscriberTags = json_decode('{"hu":2174325}', true); $availableTags = json_decode('{"cz":2174305,"hu":2174325,"at":2174333,"de":2174353,"pl":2174365,"sk":2174373,"gb":2174381,"nl":2174385,"gr":2174877,"ru":2174881}', true); $actualSubscriberTags = []; $addTags = []; $removeTags = []; foreach (['us', 'hu'] as $country) { $actualSubscriberTags[] = $country; if (!array_key_exists($country, $subscriberTags) && !in_array($country, $addTags)) { $addTags[] = $country; } } foreach (array_keys($subscriberTags) as $tag) { if (!in_array($tag, $actualSubscriberTags) && !in_array($tag, $removeTags)) { $removeTags[] = $tag; } } foreach ($addTags as $tag) { if (!array_key_exists($tag, $availableTags)) { echo 'ADD TAG ' . $tag . PHP_EOL; $availableTags[$tag] = $tag; } echo 'ADD TO USER ' . $availableTags[$tag] . PHP_EOL; } foreach ($removeTags as $tag) { echo 'REMOVE FROM USER' . $availableTags[$tag] . PHP_EOL; }