计算剩余时间

remaintime.php

    /**
     * 剩余时间
     */
    public static function remaintime($targettime) 
    {
        $nowtime = time();
        
        $re = array('day'=>0, 'hour'=>0, 'minute'=>0, 'second'=>0);
        
        if ($targettime < $nowtime) {
            return $re;
        }
        
        $tmp = $targettime - $nowtime;
        $day_num = intval($tmp / (3600*24));          //天数
        
        if ($day_num > 0) {
            $re['day'] = $day_num;
        }
        
        $remain_hour = $tmp % (3600*24);        //除去天数之后剩余秒数
        $hour_num = intval($remain_hour/3600);  //小时数
        
        if ($hour_num>0) {
            $re['hour'] = $hour_num;
        }
        
        $remain_minute = $remain_hour % 3600;   //除去小时数之后剩余秒数
        $minute_num = intval($remain_minute / 60);  //分种数
        
        if ($minute_num>0) {
            $re['minute'] = $minute_num;
        }
        
        $re['second'] = $remain_minute % 60;    //秒数
        
        return $re;
    }