php+js倒计时

1、js的时间戳和php的时间戳转换需要注意的地方

JS时间戳为13位，包含3位毫秒的(最后面的三位)，而PHP只有10位不包含毫秒的。

 

2、以下是js代码

<script type="text/javascript">
var Tday = new Array();
var daysms = 24 * 60 * 60 * 1000;
var hoursms = 60 * 60 * 1000;
var Secondms = 60 * 1000;
var microsecond = 1000;
var DifferHour = -1;
var DifferMinute = -1;
var DifferSecond = -1;
function clock( key ) {
    var time = new Date();
    var hour = time.getHours();
    var minute = time.getMinutes();
    var second = time.getSeconds();
    var timevalue = ""+((hour > 12) ? hour-12:hour);
    timevalue +=((minute < 10) ? ":0":":")+minute;
    timevalue +=((second < 10) ? ":0":":")+second;
    timevalue +=((hour >12 ) ? " PM":" AM");
    var convertHour = DifferHour;
    var convertMinute = DifferMinute;
    var convertSecond = DifferSecond;
    var Diffms = Tday[key].getTime() - time.getTime();
    DifferHour = Math.floor(Diffms / daysms);
    Diffms -= DifferHour * daysms;
    DifferMinute = Math.floor(Diffms / hoursms);
    Diffms -= DifferMinute * hoursms;
    DifferSecond = Math.floor(Diffms / Secondms);
    Diffms -= DifferSecond * Secondms;
    var dSecs = Math.floor(Diffms / microsecond);   
    if(convertHour != DifferHour) {
        a="<font class=f4_c><strong>"+DifferHour+"</strong></font>天";
    }
    if(convertMinute != DifferMinute) {
        b="<font class=f4_c><strong>"+DifferMinute+"</strong></font>时";
    }
    if(convertSecond != DifferSecond) {
        c="<font class=f4_c><strong>"+DifferSecond+"</strong></font>分";
    }
    d="<font class=f4_c><strong>"+dSecs+"</strong></font>秒";
    if (DifferHour>0) {
        a=a;
    } else {
        a='';
    }
   document.getElementById("leftTime"+key).innerHTML = a + b + c + d; 
}
</script>

3、下面是模板文件

{foreach from=$goods item=goods name=goods}
    <div id="leftTime{$smarty.foreach.goods.iteration}"></div>
    <script type="text/javascript">
        Tday[{$key}] = new Date("{$goods.gmt_end_time}");        
        window.setInterval(function(){clock({$key});}, 1000);     
    </script>
{/foreach}