$user_id = $_SESSION['user_id']; echo "Welcome, User #" . $user_id;
$user_id = rand(100000, 999999); echo "Your user id is " . $user_id;
require_once 'vendor/autoload.php'; use Ramsey\Uuid\Uuid; $user_id = Uuid::uuid4(); echo "Your user id is " . $user_id->toString();Package/library: Ramsey/Uuid package is required for this example.