Creating a php file to fingerprint a user

Hi,

I'm trying to use php to track visitors devices. The idea here is when a user visit the site the php script will try to reverse contact the ip and retrieve any information (example: html, warning messages or whatever the user has on port 80.

I got the almost all done with the code but i just need some help with file_get_contents since it's not retrieving anything even if i point to a file location that exists.

PHP Code:

...
$section = file_get_contents('$user_ip');
$ourFileName = "$user_ip";
$ourFileHandle = fopen($ourFileName, 'w') or die("can't open file");
fwrite($ourFileHandle, $section);
fclose($ourFileHandle);
?>

Thanks

Using a snip code that was given by a member here in the forum. It's working :smile:
but i still have a problem with

fwrite($ourFileHandle, '$ch');
Warning: fwrite() expects parameter 2 to be string, resource given in...

PHP Code:

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,"http://$user_ip:80");
$server_output = curl_exec ($ch);
curl_close ($ch);

$ourFileName = "$user_ip";
$ourFileHandle = fopen($ourFileName, 'w') or die("can't open file");
fwrite($ourFileHandle, '$ch');
fclose($ourFileHandle);
?>