用于在线考试系统的定时器，用于存储每个单独部分的时间

Question

我正在开发一个在线考试，我需要有一个倒计时计时器/时钟显示在整个测试期间。此外，在显示最终结果的同时，还应显示解决每个单独问题所用的时间以及测试所用的总时间。

实现此功能的最佳方法可能是什么？

<?php

$countfile = "counter.txt";

// location of site statistics.
$statsfile = "stats.txt";

// checks whether the file exist, if not then server will create it.
if (file_exists($countfile)) {

// open the counter hit file.
$fp = fopen($countfile, "r"); 

// reads the counter hit file and gets the size of the file.
$output = fread($fp, filesize($countfile));

// close the counter hit file.
fclose($fp); 

// get the integer value of the variable.
$count = intval($output);
}

// if file is doesn't exist, the server will create the counter hit file and gives a value of zero.
else { 
$count = 0;
}

// showcount function starts here.
function ShowCount() { 

// declares the global variables.
global $ShowCount, $countfile, $statsfile, $count;

// get the current month.
$month = date('m');

// get the current day.
$day = date('d');

// get the current year.
$year = date('Y');

// get the current hour.
$hour = date('G');

// get the current minute.
$minute = date('i');

// get the current second.
$second = date('s');

// this is the date used in the stats file
$date = "$month/$day/$year $hour:$minute:$second";

// this is the remote IP address of the user.
$remoteip = getenv("REMOTE_ADDR");

// some of the browser details of the user.
$otherinfo = getenv("HTTP_USER_AGENT");

// retrieve the last URL where the user visited before visiting the current file.
$ref = getenv("HTTP_REFERER");

// open the statistics file. 
$fp = fopen($statsfile, "a");

// put the given data into the statistics file.
fputs($fp, "Remote Address: $remoteip | ");
fputs($fp, "Information: $otherinfo | ");
fputs($fp, "Date: $date | ");
fputs($fp, "Referer: $ref\n");

// close the statistics file.
fclose($fp);

// adds 1 count to the counter hit file.
$count++;

// open the counter hit file.
$fp = fopen($countfile, "w");

// write at the counter hit file.
// if the value is 34, it will be changed to 35.
fwrite($fp, $count);

// close the counter hit file.
fclose($fp);

// showcount variable is equal to count variable.
$ShowCount = $count;

// return the value of the count variable into showcount variable.
return $ShowCount;
}

// display the value in the counter hits file.
echo showcount(), " visits";

?> 

我使用这个脚本来跟踪访问者统计数据和visit...it的工作时间fine.however我无法跟踪每个考试类别中单个问题的时间(每个考试都有多个类别，有多个问题)。需要帮助

Answer 1

使用会话时，您需要跟踪该部分的用户时间何时到期

<?php
// Upon starting the section
session_start();
$_SESSION['TIMER'] = time() + 600; // Give the user Ten minutes
?>

不要在页面重新加载时这样做，因为他们可以简单地刷新页面并重置计时器

在页面上，使用Javascript显示时钟：

<script type="text/javascript">
var TimeLimit = new Date('<?php echo date('r', $_SESSION['TIMER']) ?>');
</script>

然后，您可以使用变量'TimeLimit‘显示倒计时

<script type="text/javascript">
function countdownto() {
  var date = Math.round((TimeLimit-new Date())/1000);
  var hours = Math.floor(date/3600);
  date = date - (hours*3600);
  var mins = Math.floor(date/60);
  date = date - (mins*60);
  var secs = date;
  if (hours<10) hours = '0'+hours;
  if (mins<10) mins = '0'+mins;
  if (secs<10) secs = '0'+secs;
  document.body.innerHTML = hours+':'+mins+':'+secs;
  setTimeout("countdownto()",1000);
  }

countdownto();
</script>

Answer 2

您可以通过执行以下操作来实现此目的

当学生开始考试时，在一些store/database.

• To中存储

1. StartTime进行倒计时，你可以在客户端使用javascript。写一个函数，它将需要2次，第一次将是服务器时间，第二次将是StartTime。使用这些方法，你可以找出候选人解决问题的时间，并且从中你可以找出剩余的时间。使用candidate.
2. Add的setInterval，您可以显示滴答表。
3. 用于解决问题所用的时间，存储对javascript可见问题的持续时间单个问题所用的时间，并显示总时间。

我猜这就是你要找的答案。