I'm currently learning more about php objects and constructors/destructors, but i've noticed in my code that the parent class's destructor is being called twice, I thought it was because i was extending the first class to my second class and that the second class was calling it, but this is what the php docs say about that:

Like constructors, parent destructors will not be called implicitly by the engine. In order to run a parent destructor, one would have to explicitly call parent::__destruct() in the destructor body.

so if it is not being called by the subclass then is it because by extended the first class that i've made a reference to the parent class making it call itself twice or I'm I way off base here?

the code:

<?php

class test{
    public $test1 = "this is a test of a pulic property";
    private $test2 = "this is a test of a private property";
    protected $test3 = "this is a test of a protected property";
    const hello = 900000;
    function __construct($h){
        //echo 'this is the constructor test '.$h;
    }

    function x($x2){
        echo ' this is fn x'.$x2;
    }
    function y(){
        print "this is fn y";
    }


    }

    $obj = new test("this is an \"arg\" sent to instance of test");

    class hey extends test{
        function hey(){
            $this->x('<br>from the host with the most');
            echo ' <br>from hey class'.$this->test3;
        }


    }

    $obj2 = new hey();
    echo $obj2::hello;
?>