$manager = new ScriptEngineManager();
$engine = $manager->getEngineByName("juel");
echo $engine->eval('${1 + 2}'); //prints 3

$manager = new ScriptEngineManager();
$engine = $manager->getEngineByName("juel");

$simple = new class () {
    public $propFloat = 1.23;

    public function foo(): int
    {
        return 11;
    }

    public function bar(): int
    {
        return 23;
    }
};
$engine->put("simple", $simple);

echo $engine->eval('${simple.propFloat + 2}'); //prints 3.23
echo $engine->eval('${simple.bar() + simple.foo()}'); //prints 34

$manager = new ScriptEngineManager();
$engine = $manager->getEngineByName("lua");
$engine->put('a', 5);

echo  $engine->eval(<<<CODE
                factorial = function ( n )
                    if n == 1 then return 1
                    else return n * factorial( n - 1 )
                    end
                end
                return factorial(a)
                CODE
            ); //prints 120