What are the potential pitfalls of using session variables in PHP?

One potential pitfall of using session variables in PHP is that they can be vulnerable to session hijacking or session fixation attacks if not properly secured. To mitigate this risk, it is recommended to use session_regenerate_id() function to generate a new session ID on successful login or privilege change. 

session_start();

// Check if session is already started
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

// Regenerate session ID to prevent session fixation
session_regenerate_id(true);

Keywords

session variables security vulnerabilities data leakage session hijacking session fixation

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