src/Service/reportService.php
public function getUniqueString()
    {
        $mdy = date("mdy");
        $hms = date("His");
        $rightnow = $mdy.$hms;

        return md5($rightnow);
    }
public function getUniqueString()
    {
        $mdy = date("mdy");
        $hms = date("His");
        $rightnow = $mdy.$hms;

        return md5($rightnow);
    }
Get unique string by time and MD5

@return string