Which is the better approach to initialize php properties?

Question

Here are two way to initialize class variables.

1st Method

class Test {
    private $var1;
    private $var2;

    public function Test($var1,$var1) {
         


        

Answer 1

What about this

class A{

    public $x;
    public $y;
    function A($var1=10,$var2=15){   //the default value for the class
        $this->x=$var1;  
        $this->y=$var2;

    }
}

$object_of_A= new A(20,30);  //if you do not want to change the default value then
                               //pass no arguments