php取得系统启动时间长短实例代码 //系统启动时间计算. $UPTIME = 32936982.68; $DAY = floor(($UPTIME / 86400)*1.0) ; $cal_day = $DAY * 86400 ; $cal_hour = $UPTIME - $cal_day ; $hour = floor(($cal_hour / 3600)*1.0) ; if ($hour $hour = "0".$hour ; } $cal_tmp = $hour * 3600 ; $cal_min = $cal_hour - $cal_tmp ; $min = floor(($cal_min / 60)*1.0) ; if ($min $min = "0".$min ; } $cal_sec = $min * 60 ; $sec = floor(($cal_min - $cal_sec)*1.0) ; if ($min $sec = "0".$sec ; } $ServerUptime = $DAY." 天, ".$hour.":".$min.":".$sec ; echo 结果输出: . $ServerUptime ; ?> 结果输出: 381 天, 05:09:042