What are the potential pitfalls of storing and retrieving data in sessions in PHP?

One potential pitfall of storing and retrieving data in sessions in PHP is the risk of exposing sensitive information if the session data is not properly secured. To mitigate this risk, it is important to always sanitize and validate any data stored in sessions, as well as encrypting sensitive information before storing it. 

// Example of securely storing sensitive information in sessions
session_start();

// Encrypt sensitive data before storing it in the session
$sensitiveData = encryptData($userData);

$_SESSION['sensitive_data'] = $sensitiveData;

function encryptData($data) {
    // Implement encryption algorithm here
}

Keywords

session variables session hijacking session fixation session storage session security

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