Are there specific measures or configurations that can be implemented to ensure PHP code remains secure and inaccessible to unauthorized users?

To ensure PHP code remains secure and inaccessible to unauthorized users, you can implement measures such as using secure coding practices, validating input data, escaping output data, using prepared statements for database queries, and implementing proper authentication and authorization mechanisms. 

// Example of implementing authentication and authorization in PHP code
session_start();

// Check if user is authenticated
if (!isset($_SESSION['user_id'])) {
    header('Location: login.php');
    exit();
}

// Check if user is authorized
if ($_SESSION['role'] !== 'admin') {
    echo 'You are not authorized to access this page.';
    exit();
}

// Secure code goes here

Keywords

PHP security access control authentication encryption input validation

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