This very simple class enables you to track number of visitors online in
an easy and accurate manner.
By : tebrino
<?php
/*
usersOnline.php
Author: Ilir Fekaj
Contact: tebrino@hotmail.com
Date: December 21, 2003
Latest version & info: http://www.free-midi.org/scripts/
Demo: http://www.free-midi.org
This very simple class enables you to track number of visitors online in
an easy and accurate manner. It's free for all purposes, just please don't
claim you wrote it. If you have any problems, please feel free to contact me.
Also if you use it, please send me the page URL.
Example usage:
include_once ("usersOnline.class.php");
$visitors_online = new usersOnline;
if ($visitors_online->count_users() == 1) {
echo "There is " . $visitors_online->count_users() . " visitor online";
}
else {
echo "There are " . $visitors_online->count_users() . " visitors online";
}
Important: You need to create database connection and select database before creating object!
--------------------------------------------
Table structure:
CREATE TABLE `useronline` (
`id` int(10) NOT NULL auto_increment,
`ip` varchar(15) NOT NULL default '',
`timestamp` varchar(15) NOT NULL default '',
PRIMARY KEY (`id`),
UNIQUE KEY `id`(`id`)
) TYPE=MyISAM COMMENT='' AUTO_INCREMENT=1 ;
*/
class usersOnline {
var $timeout = 600;
var $count = 0;
function usersOnline () {
$this->timestamp = time();
$this->ip = $this->ipCheck();
$this->new_user();
$this->delete_user();
$this->count_users();
}
function ipCheck() {
/*
This function checks if user is coming behind proxy server. Why is this important?
If you have high traffic web site, it might happen that you receive lot of traffic
from the same proxy server (like AOL). In that case, the script would count them all as 1 user.
This function tryes to get real IP address.
Note that getenv() function doesn't work when PHP is running as ISAPI module
*/
if (getenv('HTTP_CLIENT_IP')) {
$ip = getenv('HTTP_CLIENT_IP');
}
elseif (getenv('HTTP_X_FORWARDED_FOR')) {
$ip = getenv('HTTP_X_FORWARDED_FOR');
}
elseif (getenv('HTTP_X_FORWARDED')) {
$ip = getenv('HTTP_X_FORWARDED');
}
elseif (getenv('HTTP_FORWARDED_FOR')) {
$ip = getenv('HTTP_FORWARDED_FOR');
}
elseif (getenv('HTTP_FORWARDED')) {
$ip = getenv('HTTP_FORWARDED');
}
else {
$ip = $_SERVER['REMOTE_ADDR'];
}
return $ip;
}
function new_user() {
$insert = mysql_query ("INSERT INTO useronline(timestamp, ip) VALUES ('$this->timestamp', '$this->ip')");
}
function delete_user() {
$delete = mysql_query ("DELETE FROM useronline WHERE timestamp < ($this->timestamp - $this->timeout)");
}
function count_users() {
$count = mysql_num_rows ( mysql_query("SELECT DISTINCT ip FROM useronline"));
return $count;
}
}
?>
| DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware. |
More Counters Code Articles
More By Codewalkers
 developerWorks - FREE Tools!
|
Learn field-tested SOA principles, methodology, technology and implementation from the global SOA market leader - in a new e-book by an IBM SOA expert. Written by IBM Certified SOA Solution Designer Bobby Woolf, "Exploring IBM SOA Technology & Practice" is the ultimate insider's guide to SOA - a PDF e-book packed cover to cover with IBM's specific advice on how to make your SOA implementation a success.
FREE! Go There Now!
|
|
|
|
Attend this launch webcast with Scott Hebner, Vice President of IBM Rational Marketing and Strategy, for an overview of Rational’s new software offerings and resources to help modernize and accelerate software innovation on i on Power Systems – while ensuring past application investments are protected and continue to grow. Learn how these solutions are helping customers extend their core i5/OS solutions toward modern architectures such as SOA and web technologies to deliver business improvements that stand the test of time.
FREE! Go There Now!
|
|
|
|
IBM Enterprise Modernization solutions help organizations evolve core IT systems towards modern architectures and technologies—reducing the burden of maintenance and freeing up resources to develop new business requirements and capabilities. With the IBM Enterprise Modernization Sandbox for System z you can evaluate IBM Enterprise Modernization solutions focused on five key areas: Assets, Architectures, Skills, Processes and Infrastructures, and Investment. Each solution is based upon real customer experiences and offers a proven path to get you started with your modernization projects.
FREE! Go There Now!
|
|
|
|
Analysts, architects, and developers who have existing COBOL or PL/I skills and want to extend those skills to deploy new workloads on the mainframe can use the IBM Enterprise Modernization Sandbox for System z to find hands-on walkthroughs of common real world scenarios. The scenarios provide examples of how to rapidly design, create, assemble, test, and deploy high-quality Web, Web services, portal, and SOA applications for IBM CICS, IBM IMS, and IBM WebSphere Application Server.
FREE! Go There Now!
|
|
|
|
Learn how to implement a build management system that uses and extends your existing automation technologies. This tutorial shows, step-by-step, how to install and configure IBM Rational Build Forge to manage builds for Jakarta Tomcat from source code.
FREE! Go There Now!
|
|
|
|
Join this Rational Talks to You teleconference on December 6 at 1:00 pm ET to participate in an agile application development discussion and get your questions answered on using IBM Rational Method Composer in a distributed environment.Get your questions answered!
FREE! Go There Now!
|
|
|
|
Get a free trial download of IBM Lotus Forms V3.0 (formerly Workplace Forms), which provides a zero-footprint eForms solution to help you automate and move forms-based business processes off the desktop and onto the Web. With Lotus Forms, you can extend applications beyond the firewall by creating a single electronic form document ready for use in both thick and Web 2.0 thin client format.
FREE! Go There Now!
|
|
|
|
As businesses grow increasingly dependent upon Web applications, these complex entities grow more difficult to secure. Most companies equip their Web sites with firewalls, Secure Sockets Layer (SSL), and network and host security, but the majority of attacks are on applications themselves – and these technologies cannot prevent them. This paper explains what you can do to help protect your organization, and it discusses an approach for improving your organization’s Web application security.
FREE! Go There Now!
|
|
|
|
Join this Rational Talks to You teleconference, to hear how Enterprise Generation Language (EGL) eliminates the need for tedious and error-prone low level coding, so developers can focus on business requirements. EGL extends the Rational software development platform with a simplified programming language that enables developers who have little or no experience with Java, Web technologies or Service Oriented Architecture, to create enterprise-class applications and services quickly and easily. It also allows developers who may have little or no mainframe programming experience to quickly create traditional mainframe components.
FREE! Go There Now!
|
|
|
|
The Eclipse community is constantly working to extend Eclipse's functionality. In this webcast, learn about some of the most important and feature-rich projects under development. From multi-language support to plug-in development, tune in to see what Eclipse is capable of now.
FREE! Go There Now!
|
|
|
|
All FREE IBM® developerWorks Tools!
|
