What considerations should be made when trying to differentiate between multiple computers on the same network using PHP for visitor tracking?

When trying to differentiate between multiple computers on the same network for visitor tracking using PHP, one consideration is to use a combination of IP address and user agent string to uniquely identify each visitor. This can help distinguish between different devices accessing the website from the same network. Additionally, setting a cookie with a unique identifier for each visitor can also be helpful in tracking individual users. 

// Get the visitor's IP address
$ip_address = $_SERVER['REMOTE_ADDR'];

// Get the visitor's user agent string
$user_agent = $_SERVER['HTTP_USER_AGENT'];

// Combine IP address and user agent string to create a unique identifier
$visitor_id = md5($ip_address . $user_agent);

// Set a cookie with the visitor's unique identifier
setcookie('visitor_id', $visitor_id, time() + 3600, '/');

Keywords

IP address user agent cookies session variables network traffic.

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