private static function makeSureLogFileExists() { if (self::$logFilePath == null) { $folder = __DIR__ . DIRECTORY_SEPARATOR . "log"; if (!file_exists($folder)) { mkdir($folder); } self::$logFilePath = $folder . DIRECTORY_SEPARATOR . basename(__FILE__, ".php") . "_" . self::formTs() . ".log"; touch(self::$logFilePath); } }