private static function find_entry(&$in, $id, $offset)
{
fseek($in, $offset);
do {
$previousEntry = $entry;
$entry = MMDBParser::read_entry($in);
if ($previousEntry != null && $entry['id'] < $previousEntry['id']) {
return null;
}
} while ($id != $entry['id']);
return $entry;
}
