VersionPress\Storages\Serialization\IniSerializer::restoreTypesOfValues PHP Method

    private static function restoreTypesOfValues($deserialized)
    {
        $result = [];
        foreach ($deserialized as $key => $value) {
            if (is_array($value)) {
                $result[$key] = self::restoreTypesOfValues($value);
            } else {
                if (Strings::startsWith($value, self::$numberMarker)) {
                    // strip the marker and convert to number
                    $result[$key] = str_replace(self::$numberMarker, '', $value) + 0;
                } elseif (Strings::startsWith($value, self::$nullMarker)) {
                    $result[$key] = null;
                } else {
                    $result[$key] = self::unescapeString($value);
                }
            }
        }
        return $result;
    }