What are the potential risks of accessing protected variables in the global $_SESSION variable in PHP?

Accessing protected variables in the global $_SESSION variable in PHP can lead to security vulnerabilities as it exposes sensitive data to potential manipulation or unauthorized access. To mitigate this risk, it is recommended to use proper access control mechanisms and avoid directly accessing protected variables in the $_SESSION variable. 

class User {
    private $username;

    public function getUsername() {
        return $this->username;
    }
}

// Accessing the username securely
session_start();
$user = new User();
$user->setUsername($_SESSION['username']);
$username = $user->getUsername();

Keywords

global $_SESSION variables risks access

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