How to record page dwell time in PHP, php page dwell time_PHP tutorial

How PHP records page dwell time, php page dwell time

The example in this article describes the method of PHP recording page dwell time. Share it with everyone for your reference, the details are as follows:

First add JS to the page you want to monitor as follows

<script>
var dt1 = new Date();
window.onbeforeunload = function(){
  var dt2 = new Date();
  var ms = dt2.getTime() - dt1.getTime();
  var img = new Image();
  img.src = 'log.php&#63;stay_ms=' + ms;
}
</script>

log.php code is as follows

<&#63;php
$refer = '';
if (isset($_SERVER['HTTP_REFERER']))
{
  $refer = $_SERVER['HTTP_REFERER'];
}
$user_agent = '';
if (isset($_SERVER['HTTP_USER_AGENT']))
{
  $user_agent = $_SERVER['HTTP_USER_AGENT'];
}
$ip = $_SERVER['REMOTE_ADDR'];
if (isset($_GET['stay_ms']))
{
  $log = '[' . date("Y-m-d H:i:s") . '] ' . $ip . ' ' . $refer . ' @ ' . number_format($_GET['stay_ms']) . "ms\r\n";
  file_put_contents("log/log_" . date("Y-m-d") . ".txt", $log, FILE_APPEND);
}
if ($_SERVER['QUERY_STRING'] == '' || isset($_GET['day']))
{
  $day = isset($_GET['day']) &#63; $_GET['day'] : date("Y-m-d");
  $file = "log/log_" .$day . ".txt";
  if (file_exists($file))
  {
    $log = file_get_contents($file);
    echo nl2br($log);
  }
}

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I hope this article will be helpful to everyone in PHP programming.

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