Is it necessary to compare the current session ID with the session ID stored in the database to ensure the correct username is associated with the session for data access?

When a user logs in, a session ID is generated and stored in the database along with the username. To ensure that the correct username is associated with the session for data access, it is necessary to compare the current session ID with the session ID stored in the database. 

// Retrieve the session ID stored in the database for the logged-in user
$stored_session_id = $db->query("SELECT session_id FROM users WHERE username = 'logged_in_username'")->fetchColumn();

// Compare the stored session ID with the current session ID
if ($stored_session_id !== session_id()) {
    // Redirect the user to the login page or perform any other necessary action
    header("Location: login.php");
    exit();
}

// The correct username is associated with the current session, proceed with data access
// Your data access code here

Keywords

PHP session ID database data access security.

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