Track Your Visitors, Using PHP
By Dennis Pallett2005-05-26
Getting the information
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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/manual/en/function.gethostbyaddr.php) 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://www.phpit.net/code/iif-function.
Tutorial Pages:
» Track your visitors, using PHP
» Getting the information
» Logging the information
» Okay, now I want to view my log file
» In Conclusion...
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