/生日倒计时$birthday = "2017-12-29";date_default_timezone_set("PRC");//今天的时间戳$today = time();echo "今天是".date("Y-m-d",$today)."";//生日时间戳$bstamp = strtotime($birthday);//倒计时多少天$rev = ceil(($bstamp-$today)/(24*3600));echo "距离您的生日还有".$rev."天";