use Twig\Environment; use Twig\Loader\FilesystemLoader; // create a new instance of Twig_Environment $loader = new FilesystemLoader('path/to/templates'); $twig = new Environment($loader); // create a new Twig_Template instance from a string $template = $twig->createTemplate('Hello {{ name }}!'); // render the template with parameters echo $template->render(['name' => 'John']);This code creates a new instance of the Twig_Environment class, defines a template string containing a Twig variable, creates a new Twig_Template instance from the template string, and then renders the template with the supplied parameter value for the variable. The library used in this example is the Twig template engine library for PHP, which provides a robust set of tools for rendering templates with ease and flexibility.