What considerations should be taken into account when determining if a visitor is new or returning based on IP addresses?

When determining if a visitor is new or returning based on IP addresses, it is important to consider the limitations of IP addresses as they can be dynamic and change frequently for users. One approach is to set a cookie on the visitor's browser to track their visits, in addition to using IP addresses. This can help differentiate between new and returning visitors more accurately. 

// Check if visitor is new or returning based on IP address and cookie
$visitor_ip = $_SERVER['REMOTE_ADDR'];
$cookie_name = 'visitor_status';

if(isset($_COOKIE[$cookie_name])) {
    echo "Returning visitor";
} else {
    setcookie($cookie_name, $visitor_ip, time() + (86400 * 30), "/"); // Set cookie for 30 days
    echo "New visitor";
}

Keywords

IP address visitor new returning determination

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