What are the potential pitfalls of using session_id() in PHP for session management?

Using session_id() in PHP for session management can lead to potential security vulnerabilities if the session ID is not properly generated or validated. It is recommended to use session_regenerate_id() to create a new session ID whenever a user's privilege level changes or upon successful login to prevent session fixation attacks. 

session_start();

// Check if session ID needs to be regenerated
if ($_SESSION['previous_privilege_level'] != $_SESSION['current_privilege_level']) {
    session_regenerate_id(true);
}

// Update privilege level
$_SESSION['previous_privilege_level'] = $_SESSION['current_privilege_level'];

Keywords

session_id session management security vulnerabilities session hijacking session fixation

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