How to record page stay time in PHP _ php tips-php Tutorial

This article describes how to record the page stay time in PHP. it involves PHP and js operations on files and time, for more information about how to record the page stay time in PHP, see the example in this article. We will share this with you for your reference. The details are as follows:

First, add the following JS on the page to be monitored:

《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?stay_ms=' + ms;}《script》

The log. php code is as follows:

<?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']) ? $_GET['day'] : date("Y-m-d");  $file = "log/log_" .$day . ".txt";  if (file_exists($file))  {    $log = file_get_contents($file);    echo nl2br($log);  }}