Calling a variable from another class PHP

Question

I'm in the phase of learning OOP in PHP and i wanna know how to call a variable from another PHP class.

eg.

class first {
    public $var1 = 1;
}

I guess it's this way but i don't know how to continue:

$first = new $first();

Answer 1

You should do something like this:

$first = new first();
echo $first->var1;

Answer 2

You need to call it like this:

$first = new first();
$first->var1;