oop - How to dynamically instantiate an object in PHP?

Question

Can we dynamically create and initialize an object in PHP? This is the normal code:

class MyClass{
    var $var1 = null;
    var $var2 = null;
    .
    .
    public function __construct($args){
        foreach($args as $key => $value)
            $this->$key = $value;
    }
}
---------------------
$args = ($_SERVER['REQUEST_METHOD'] == "POST") ? $_POST : $_REQUEST;
$obj = new MyClass($args);

The above code works fine. Please note that the names of REQUEST parameters are accurately mapped with the members of class MyClass.

But can we do something like this:

$class = "MyClass";
$obj = new $class;

If we can do like this, then can we initialize $obj by using $args.

According to this post, $obj = $class should work. But it does not work for me. I tried get_class_vars($obj). It threw an exception.

Thanks

Answer 1

It's more a comment, but I leave it here more prominently:

$class = "MyClass";
$obj = new $class($args);

This does work. See new^Docs.