There are many different traffic analysis tools, ranging from simple counters to complete traffic analyzers. Although there are some free ones, most of them come with a price tag. Why not do it yourself? With PHP, you can easily create a log file within minutes. In this article I will show you how!
Getting the information
The most important part is getting the information from your visitor. Thankfully, this is extremely easy to do in PHP (or any other scripting language for that matter). PHP has a special global variable called $_SERVER which contains several environment variables, including information about your visitor. To get all the information you want, simply use the following code:
// Getting the information
$ipaddress = $_SERVER['REMOTE_ADDR'];
$page = "http://{$_SERVER['HTTP_HOST']}{$_SERVER['PHP_SELF']}";
$page .= iif(!empty($_SERVER['QUERY_STRING']), "?{$_SERVER['QUERY_STRING']}", "");
$referrer = $_SERVER['HTTP_REFERER'];
$datetime = mktime();
$useragent = $_SERVER['HTTP_USER_AGENT'];
$remotehost = @getHostByAddr($ipaddress);
As you can see the majority of information comes from the $_SERVER variable. The mktime() (http://nl2.php.net/mktime) and getHostByAddr() (http://nl2.php.net/mktime) functions are used to get additional information about the visitor.
Note: I used a function in the above example called iif(). You can get this function at http://nl2.php.net/mktime.
Logging the information
Now that you have all the information you need, it must be written to a log file so you can later look at it, and create useful graphs and charts. To do this you need a few simple PHP function, like fopen (http://nl2.php.net/mktime) and fwrite (http://nl2.php.net/mktime).
The below code will first create a complete line out of all the information. Then it will open the log file in "Append" mode, and if it doesn't exist yet, create it.
If no errors have occurred, it will write the new logline to the log file, at the bottom, and finally close the log file again.
// Create log line
$logline = $ipaddress . '|' . $referrer . '|' . $datetime . '|' . $useragent . '|' . $remotehost . '|' . $page . " ";
// Write to log file:
$logfile = '/some/path/to/your/logfile.txt';
// Open the log file in "Append" mode
if (!$handle = fopen($logfile, 'a+')) {
die("Failed to open log file");
}
// Write $logline to our logfile.
if (fwrite($handle, $logline) === FALSE) {
die("Failed to write to log file");
}
fclose($handle);
Now you've got a fully function logging module. To start tracking visitors on your website simply include the logging module into your pages with the include() function (http://nl2.php.net/mktime):
include ('log.php');
Okay, now I want to view my log file
After a while you'll probably want to view your log file. You can easily do so by simply using a standard text editor (like Notepad on Windows) to open the log file, but this is far from desired, because it's in a hard-to-read format.
Let's use PHP to generate useful overviews for is. The first thing that needs to be done is get the contents from the log file in a variable, like so:
// Open log file
$logfile = "/some/path/to/your/logfile.txt";
if (file_exists($logfile)) {
$handle = fopen($logfile, "r");
$log = fread($handle, filesize($logfile));
fclose($handle);
} else {
die ("The log file doesn't exist!");
}
Now that the log file is in a variable, it's best if each logline is in a separate variable. We can do this using the explode() function (http://nl2.php.net/mktime), like so:
// Seperate each logline
$log = explode(" ", trim($log));
After that it may be useful to get each part of each logline in a separate variable. This can be done by looping through each logline, and using explode again:
// Seperate each part in each logline
for ($i = 0; $i < count($log); $i++) {
$log[$i] = trim($log[$i]);
$log[$i] = explode('|', $log[$i]);
}
Now the complete log file has been parsed, and we're ready to start generating some interesting stuff.
The first thing that is very easy to do is getting the number of pageviews. Simply use count() (http://nl2.php.net/mktime) on the $log array, and there you have it;
echo count($log) . " people have visited this website.";
You can also generate a complete overview of your log file, using a simple foreach loop and tables. For example:
// Show a table of the logfile
echo '';
echo 'IP Address';
echo 'Referrer';
echo 'Date';
echo 'Useragent';
echo 'Remote Host';
foreach ($log as $logline) {
echo '
echo '
echo '
echo '
echo '
echo '
echo '
}
echo '';
You can also use custom functions to filter out search engines and crawlers. Or create graphs using PHP/SWF Charts (http://nl2.php.net/mktime). The possibilities are endless, and you can do all kinds of things!
In Conclusion...
In this article I have shown you have to create a logging module for your own PHP website, using nothing more than PHP and its built-in functions. To view the log file you need to parse it using PHP, and then display it in whatever way you like. It is up to you to create a kick-ass traffic analyzer.
If you still prefer to use a pre-built traffic analyzer, have a look at http://nl2.php.net/mktime.
About The Author
Dennis Pallett is a young tech writer, with much experience in ASP, PHP and other web technologies. He enjoys writing, and has written several articles and tutorials. To find more of his work, look at his websites at http://nl2.php.net/mktime, http://nl2.php.net/mktime and http://nl2.php.net/mktime.
Looks like every client wants a Flash site these days... Read More
Are you aware that 90% of the websites on the... Read More
August 8 2005, Macromedia announced a release of Studio 8.... Read More
I've heard several prominent web marketers mention in their classes... Read More
It is an undeniable fact that not everybody is keen... Read More
"What's in it for me?" you ask. "Why should I... Read More
Here's something you may never have thought of before:If I... Read More
So your traffic is going through the roof yeah? It's... Read More
Psychology is a long word which everyone thinks, "no, that's... Read More
Let's begin by setting some limits. If you're like me,... Read More
I had a client say something to me the other... Read More
Installment 1Developing State-enabled Applications With PHPWhen a user is browsing... Read More
What is the point of having a website, you may... Read More
Every business needs to know how it is doing. That's... Read More
Most interactive websites nowadays require data to be presented dynamically... Read More
This is a growing concern amongst many business owners. Does... Read More
Your content is what gets you in search engines, speaks... Read More
I recently helped my mom to launch a website (www.mom2me.com)... Read More
What do you mean, you don't have a website for... Read More
Making maximum profit from your law firm website is important,... Read More
In about the Time it takes to Watch a Reality... Read More
One of the things that many people overlook when building... Read More
Before you start building your site, ask yourself "WHY?". Why... Read More
More and more businesses are recognizing the importance of content... Read More
If you're looking for better web site ROI, chances are,... Read More
When visitors add your web site to their Favorites or... Read More
1) Word of Mouth The single most powerful form of... Read More
1. Many people are not getting good or complete advice.... Read More
First, an eye opener. Making your fortune through affiliate programs... Read More
As a business you can't afford to ignore the Internet... Read More
The popular search engine Google indexes over 8 billion websites.... Read More
One of the things that Internet excels is disseminating information... Read More
A website is the most versatile and cost-effective marketing tool... Read More
There's been widespread speculation about the new legislation being introduced... Read More
Profiles are one of the best kept secrets around regarding... Read More
Recently I was reviewing the keyword specific conversion rate data... Read More
The Internet is a remarkable publishing medium. With just a... Read More
Every small business owner knows that they need a website,... Read More
An interesting eCommerce success factor that isn't precisely overlooked, but... Read More
It's now easier than ever to take payments on the... Read More
What happened on your website yesterday? What about last week... Read More
Every online entrepreneur I talk to is asking the same... Read More
In the big, wide online world there are millions of... Read More
Simply ensuring your website is accessible to screen reader users... Read More
"How do I improve web site sales figures?" The CEO... Read More
2 Golden Rules for an Engaging Website35% of visitors fail... Read More
Now that you have got your domain name registered, your... Read More
I recently helped my mom to launch a website (www.mom2me.com)... Read More
This article was prompted by some customer support work I... Read More
There have been many significant changes to the face of... Read More
Web Development |