A very simple solution is to use a hidden iframe that loads a php web page periodically. The loaded web page logs the start time (if it doesn t exist) and the stop time. When the person leaves the page you are left with the time the person first came to the site and the last time they were there. In this case, the timestamp is updated every 3 seconds.
I use files to hold the log information. The filename I use consists of month-day-year ipaddress.htm
Example iframe php code. Put this in yourwebsite/yourAnalyticsiFrameCode.php:
<?php
// get the IP address of the sender
$clientIpAddress=$_SERVER[ REMOTE_ADDR ];
$folder = "yourAnalyticsDataFolder";
// Combine the IP address with the current date.
$clientFileRecord=$folder."/".date( d-M-Y )." ".$clientIpAddress;
$startTimeDate = "";
// check to see if the folder to store analytics exists
if (!file_exists($folder))
{
if (!mkdir($folder))
return; // error - just bail
}
if (file_exists($clientFileRecord) )
{
//read the contents of the clientFileRedord
$lines = file($clientFileRecord);
$count = 0;
// Loop through our array, show HTML source as HTML source; and line numbers too.
foreach ($lines as $line_num => $line)
{
echo($line);
if ($count == 0)
$startTimeDate = rtrim( $line );
$count++;
}
}
if ($startTimeDate == "")
$startTimeDate = date( H:i:s d-M-Y );
$endTimeDate = date( H:i:s d-M-Y );
// write the start and stop times back out to the file
$file = fopen($clientFileRecord,"w");
fwrite($file,$startTimeDate."
".$endTimeDate);
fclose($file);
?>
The javascript to periodically reload the iframe in the main web page.:
<!-- Javascript to reload the analytics code -->
<script>
window.setInterval("reloadIFrame();", 3000);
function reloadIFrame() {
document.getElementById( AnalyticsID ).src = document.getElementById( AnalyticsID ).src
// document.frames["AnalyticsID"].location.reload();
}
</script>
The iframe in the main web page looks like this:
<iframe id="AnalyticsID" name="AnalyticsID" src="http://yourwebsite/yourAnalyticsiFrameCode.php" width="1"
height="1" frameborder="0" style="visibility:hidden;display:none">
</iframe>
A very simple way to display the time stamp files:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title></title>
</head>
<body>
Analytics results
<br>
<?php
$folder = "yourAnalyticsDataFolder";
$files1 = scandir($folder);
// Loop through the files
foreach ($files1 as $fn)
{
echo ($fn."<br>
");
$lines = file($folder."/".$fn);
foreach ($lines as $line_num => $line)
{
echo(" ".$line."<br>
");
}
echo ("<br>
<br>");
}
?>
</body>
</html>
You get a results page like this:
22-Mar-2015 104.37.100.30
18:09:03 22-Mar-2015
19:18:53 22-Mar-2015
22-Mar-2015 142.162.20.133
18:10:06 22-Mar-2015
18:10:21 22-Mar-2015
