Can users manipulate session cookies to access another user's account in PHP?

Session cookies in PHP are stored on the client-side and can potentially be manipulated by users. To prevent users from accessing another user's account by manipulating session cookies, it is important to implement proper security measures such as using HTTPS, setting secure and HttpOnly flags for session cookies, and validating user sessions on the server-side. 

// Implementing secure session cookie settings
ini_set('session.cookie_secure', 1); // Forces session cookie to be sent only over HTTPS
ini_set('session.cookie_httponly', 1); // Prevents session cookie from being accessed through JavaScript

session_start(); // Start the session
// Validate user session on the server-side
if (!isset($_SESSION['user_id'])) {
    // Redirect or handle unauthorized access
    header("Location: login.php");
    exit();
}

Keywords

PHP session cookies security vulnerability session hijacking user authentication

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