What are the potential limitations or drawbacks of using IP or cookie-based restrictions in PHP scripts?

One potential limitation of using IP or cookie-based restrictions in PHP scripts is that they can be easily circumvented by users who know how to manipulate their IP address or delete cookies. To address this issue, you can implement additional security measures such as using session tokens or implementing CAPTCHA challenges. 

// Example of implementing session tokens for added security
session_start();

$token = bin2hex(random_bytes(16));
$_SESSION['token'] = $token;

// Validate token in subsequent requests
if ($_SESSION['token'] !== $_POST['token']) {
    // Token mismatch, handle error
}

Keywords

IP restrictions cookie-based restrictions limitations drawbacks PHP scripts

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