How to solve the problem of thinkphp5 losing logs?

Use thinkphp5 0 framework. It is found that sometimes the logs are lost at a certain time, but the database updates are correct. The encapsulated log function can also lose the log. Can you write the log by setting the file lock?, such asflock($fp, LOCK_EX), elder brothers, is there a good way to solve the problem of not losing your days…..

function log($folder = 'debug', $msg)
    {
        $path = LOG_PATH . $folder;
        if (!is_dir($path)) {
            mkdir($path, 0777, true);
        }
        $filename = $path . '/' . date('Ymd') . '.txt';
        $content = date("Y-m-d H:i:s") . "\r\n" . print_r($msg, 1) . "\r\n \r\n \r\n ";
        if (!is_file($filename)) {
            touch($filename);
            chmod($filename, 0777);
        }
        file_put_contents($filename, $content, FILE_APPEND);
    }

This work adoptsCC agreement, reprint must indicate the author and the link to this article