<"0", STR_PAD_LEFT);
    }
    
    /*
    * sequence number - 12 bits - up to 4096 random numbers per machine
    */
    $random = str_pad(decbin(mt_rand(0, self::max12bit)), 12, "0", STR_PAD_LEFT);

    /*
    * Pack
    */
    $base = $base.$machineid.$random;

    /*
    * Return unique time id no
    */
    return bindec($base);
  }

  public static function timeFromParticle($particle) {
    /*
    * Return time
    */
    return bindec(substr(decbin($particle),0,41)) - self::max41bit + self::EPOCH;
  }
}

"htmlcode">

Particle::generateParticle($machineId);//生成ID
Particle::timeFromParticle($particle);//反向计算时间戳


这里我做了改良 如果机器ID传0 就会去掉这10bit 因为有些时候我们可能用不到这么多ID