In what ways can PHP developers ensure that their code is secure and properly handling user access control, especially in scenarios involving admin rights?

To ensure that PHP code is secure and properly handles user access control, especially in scenarios involving admin rights, developers should implement role-based access control (RBAC) and validate user permissions before executing sensitive operations. This can be achieved by creating roles for different user types (e.g., admin, user) and checking if the current user has the necessary permissions before allowing them to perform certain actions.

// Example of checking user access control for admin rights
function isAdmin($userRole) {
    return $userRole === 'admin';
}

$userRole = 'admin'; // Assume this is retrieved from the database for the current user

if (isAdmin($userRole)) {
    // Code to execute if user has admin rights
    echo 'You have admin rights!';
} else {
    // Code to handle unauthorized access
    echo 'You do not have permission to access this page.';
}