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);
    }
public function getUniqueString ( ) { $ mdy = date ( "mdy" ) ; $ hms = date ( "His" ) ; $ rightnow = $ mdy . $ hms ; return md5 ( $ rightnow ) ; }
Get unique string by time and MD5

@return string
Get unique string by time and MD5