Example of how PHP records page dwell time

This article mainly introduces the method of PHP recording page residence time, involving PHP combined with js related operation skills for files and time. Friends in need can refer to it. I hope it will be helpful to everyone.

The details are as follows:

First add JS to the page to be monitored 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 = &#39;log.php?stay_ms=&#39; + ms;
}
</script>

log.php code is as follows

<?php
$refer = &#39;&#39;;
if (isset($_SERVER[&#39;HTTP_REFERER&#39;]))
{
  $refer = $_SERVER[&#39;HTTP_REFERER&#39;];
}
$user_agent = &#39;&#39;;
if (isset($_SERVER[&#39;HTTP_USER_AGENT&#39;]))
{
  $user_agent = $_SERVER[&#39;HTTP_USER_AGENT&#39;];
}
$ip = $_SERVER[&#39;REMOTE_ADDR&#39;];
if (isset($_GET[&#39;stay_ms&#39;]))
{
  $log = &#39;[&#39; . date("Y-m-d H:i:s") . &#39;] &#39; . $ip . &#39; &#39; . $refer . &#39; @ &#39; . number_format($_GET[&#39;stay_ms&#39;]) . "ms\r\n";
  file_put_contents("log/log_" . date("Y-m-d") . ".txt", $log, FILE_APPEND);
}
if ($_SERVER[&#39;QUERY_STRING&#39;] == &#39;&#39; || isset($_GET[&#39;day&#39;]))
{
  $day = isset($_GET[&#39;day&#39;]) ? $_GET[&#39;day&#39;] : 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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