What are the potential risks of relying solely on session IDs for unique identification in a PHP system, as discussed in the forum thread?

Relying solely on session IDs for unique identification in a PHP system can pose security risks, as session IDs can be easily manipulated or stolen by malicious users. To mitigate this risk, it is recommended to use a combination of session IDs and additional server-side generated tokens for authentication and authorization purposes. 

// Generate a unique token and store it in the session
$token = bin2hex(random_bytes(16));
$_SESSION['token'] = $token;

// Verify the token before processing any sensitive operations
if(isset($_SESSION['token']) && isset($_POST['token']) && $_SESSION['token'] === $_POST['token']) {
    // Token is valid, proceed with the operation
} else {
    // Invalid token, handle accordingly (e.g. log out the user)
}

Keywords

session IDs unique identification security vulnerabilities session hijacking session fixation

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