PHP和Javascript统计计时器

Question

我试图基于PHP变量编写一个JS计数计时器(它将计数到无穷大).不幸的是,这个变量是不可编辑的(一旦我得到它就能做到这一点,但不能改变我得到的形式,因为它来自数据库软件写入,我无法更改软件).我得到的只是秒(用户加入的秒数等等),并希望以(X天,X小时,X分钟,X秒)的格式显示.

我已经有了计时器和PHP代码的代码,但问题是解决方案的最佳方法是什么.我是否尝试在PHP中使用秒进入日期,然后让JS完全休息,或者我更换JS以便接受秒,然后进行倒计时.除此之外,我该怎么做？

我对柜台的代码:

JS里面的文件,传入变量,以便PHP可以轻松地更改这些:

<script type="text/javascript" language="JavaScript">
    TargetDate = "09/21/2012 5:00";
    CountActive = true;
</script>

然后(包括所有的计数器代码):

<script type="text/javascript"  language="JavaScript" src="js/time.js"></script>

和上面提到的.js文件:

function calcage(secs, num1, num2) {
  s = ((Math.floor(secs/num1))%num2).toString();
  if (LeadingZero && s.length < 2)
    s = "0" + s;
  return  s;
}

function CountBack(secs) {
  if (secs < 0) {
    document.getElementById("cntdwn").innerHTML = FinishMessage;
    return;
  }
  DisplayStr = DisplayFormat.replace(/%%D%%/g, calcage(secs,86400,100000));
  DisplayStr = DisplayStr.replace(/%%H%%/g, calcage(secs,3600,24));
  DisplayStr = DisplayStr.replace(/%%M%%/g, calcage(secs,60,60));
  DisplayStr = DisplayStr.replace(/%%S%%/g, calcage(secs,1,60));

  document.getElementById("cntdwn").innerHTML = DisplayStr;
  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);
}

function putspan(backcolor, forecolor) {
 document.write("<span id='cntdwn'></span>");
}

if (typeof(BackColor)=="undefined")
  BackColor = "white";
if (typeof(ForeColor)=="undefined")
  ForeColor= "#2A8827";
if (typeof(TargetDate)=="undefined")
  TargetDate = "12/31/2020 5:00 AM";
if (typeof(DisplayFormat)=="undefined")
  DisplayFormat = "%%D%% days, %%H%% hours, %%M%% minutes, %%S%% seconds.";
if (typeof(CountActive)=="undefined")
  CountActive = true;
if (typeof(FinishMessage)=="undefined")
  FinishMessage = "no data";
if (typeof(CountStepper)!="number")
  CountStepper = +1;
if (typeof(LeadingZero)=="undefined")
  LeadingZero = true;


CountStepper = Math.ceil(CountStepper);
if (CountStepper == 0)
  CountActive = false;
var SetTimeOutPeriod = (Math.abs(CountStepper)-1)*1000 + 1000;
putspan(BackColor, ForeColor);
var dthen = new Date(TargetDate);
var dnow = new Date();
if(CountStepper>0)
  ddiff = new Date(dnow-dthen);
else
  ddiff = new Date(dthen-dnow);
gsecs = Math.floor(ddiff.valueOf()/1000);
CountBack(gsecs);

Answer 1

正如评论中所建议的，我使用了 PHP。最终得到了它，通过：

从数据库获取值并将其存储在 $uptime 内（以秒为单位）。

$uptime = (time() - $uptime);
$uptime = date("m/d/Y H:i:s",$uptime);

然后我使用 date 函数更改它以适应 JS 代码，并使用新的 $uptime 变量输出它：

<script type="text/javascript" language="JavaScript">
TargetDate = "<?php echo $uptime; ?>";
CountActive = true;
</script>
<script type="text/javascript"  language="JavaScript" src="js/time.js"></script>

这确保了日期以正确的格式输出，适合 JS。