How to create new object using classname stored in variable and how to pass another variable into this class's constructor?

Question

Hello,

I have classname stored in variable $classname; also I have an array of values I should pass into object constructor.

$classname = "MyClass";
$variables = array(1, 2, 3, 4);

I need

$objInstance = new MyClass(1, 2, 3, 4);

How?

Thank you.

Answer 1

$objInstance = new $classname($variables[0], $variables[1], $variables[2], $variables[3]);

Answer 2

$r = new ReflectionClass($classname);
$objInstance = $r->newInstanceArgs($variables);