PHP精确到毫秒秒杀倒计时实例

 1 // 注意：php的时间是以秒算。js的时间以毫秒算 ?2 // 设置时区 ?3 date_default_timezone_set(‘PRC‘); ?4 //配置每天的活动时间段 ?5 $starttimestr = date(‘Y-m-d H:i:s‘, strtotime(date(‘Y-m-d‘))); ?6 $endtimestr = date(‘Y-m-d H:i:s‘, strtotime(date(‘Y-m-d‘, strtotime(‘+1 day‘)))); ?7 $starttime = strtotime($starttimestr); ?8 $endtime = strtotime($endtimestr); ?9 $nowtime = time(); 10 if ($nowtime < $starttime) { 11 ????exit("活动还没开始,活动时间是：{$starttimestr}至{$endtimestr}"); 12 } 13 if ($endtime >= $nowtime) { 14 ????$lefttime = $endtime - $nowtime; //实际剩下的时间（秒） 15 } else { 16 ????$lefttime = 0; 17 ????exit("活动已经结束！"); 18 }

 1 var runtimes = 0; ?2 function GetRTime() { ?3 ????var lefttime = < ?php echo $lefttime; ? > * 1000 - runtimes * 1000; ?4 ????????????if (lefttime >= 0) { ?5 ????????var nD = Math.floor(lefttime / (1000 * 60 * 60 * 24)) % 24; ?6 ????????var nH = Math.floor(lefttime / (1000 * 60 * 60)) % 24; ?7 ????????var nM = Math.floor(lefttime / (1000 * 60)) % 60; ?8 ????????var nS = Math.floor(lefttime / 1000) % 60; ?9 ????????document.getElementById("RemainD").innerHTML = nD; 10 ????????document.getElementById("RemainH").innerHTML = nH; 11 ????????document.getElementById("RemainM").innerHTML = nM; 12 ????????document.getElementById("RemainS").innerHTML = nS; 13 ????????if (lefttime == 5 * 60 * 1000) { 14 ????????????alert("还有最后五分钟！"); 15 ????????} 16 ????????runtimes++; 17 ????????setTimeout("GetRTime()", 1000); 18 ????} else { 19 ????????alert(‘活动结束了！‘); 20 ????????location.reload(); 21 ????} 22 } 23 var Num = 0; 24 onload = function() { 25 ????Refresh(); 26 ????setInterval("Refresh();", 100); 27 ????GetRTime(); 28 } 29 function Refresh() { 30 ????if (Num < 10) { 31 ????????document.getElementById("RemainL").innerHTML = Num; 32 ????????Num = Num + 1; 33 ????} else { 34 ????????Num = 0; 35 ????} 36 }