?page=PAGEID parameter, for example gcount.php?page=test');
}
// Remove any illegal chars from the page ID
$page = preg_replace('/[^a-zA-Z0-9\-_\.]/', '', $_GET['page']);
// Stop if $page is not valid
if (!strlen($page)) {
die('ERROR: Page ID is missing or contains only invalid chars. Please use only these chars for the page ID: a-z, A-Z, 0-9, ".", "-" and "_"');
}
// Get style and extension information
$style = isset($_GET['style'])
? preg_replace('/[^a-zA-Z0-9\-_\.]/', '', $_GET['style'])
: $default_style;
$ext = isset($_GET['ext'])
? preg_replace('/[^a-zA-Z0-9\-_\.]/', '', $_GET['ext'])
: $default_ext;
// Set values for cookie, log file and style flye names
$cname = 'gcount_unique_'.$page;
$logfile = 'logs/' . $page . '.txt';
$style_dir = 'styles/' . $style . '/';
// Does the log file exist?
if (!file_exists($logfile)) {
die('ERROR: Log file not found. Make sure there is a file called ' . $page . '.txt inside your logs folder. On most servers file names are CaSe SeNSiTiVe!');
}
// Open log file for reading and writing
if ($fp = @fopen($logfile, 'r+')) {
// Lock log file from other scripts
$locked = flock($fp, LOCK_EX);
// Lock successful?
if ($locked) {
// Let's read current count
$count = intval(trim(fread($fp, filesize($logfile))));
// If counting unique hits is enabled make sure it's a unique hit
if ($count_unique == 0 || ! isset($_COOKIE[$cname])) {
// Update count by 1 and write the new value to the log file
$count = $count + 1;
rewind($fp);
fwrite($fp, $count);
// Print the Cookie and P3P compact privacy policy
header('P3P: CP="NOI NID"');
setcookie($cname, 1, time()+60*60*$unique_hours);
}
}
else {
// Lock not successful. Better to ignore than to damage the log file
$count = 1;
}
// Release file lock and close file handle
flock($fp, LOCK_UN);
fclose($fp);
}
else {
die("ERROR: Can't read/write to the log file ($logfile). Make sure this file is writable by PHP scripts. On UNIX servers, CHMOD the log file to 666 (rw-rw-rw-).");
}
// Is zero-padding enabled? If yes, add zeros if required
if ($min_digits) {
$count = sprintf('%0' . $min_digits . 's', $count);
}
// Print out Javascript code and exit
$len = strlen($count);
for ($i = 0; $i < $len; $i++) {
$url = $base_url . $style_dir . substr($count, $i, 1) . '.' . $ext;
echo 'document.write(\'
\');';
}
exit();
?>