EventHandler::getChanges

private function getChanges(array $oldFields, array $newFields): array
{
	$changes = [];

	foreach ($newFields as $key => $value)
	{
		if (mb_strpos($key, '~') === 0)
		{
			continue;
		}
		if (array_key_exists($key, $oldFields) && $oldFields[$key] !== $value)
		{
			$changes[$key] = $value;
		}
	}

	return $changes;
}