PHP Constructors and extending parent classes

I'm coming from Java, and wanting to use the constructor of a child class the way that it works in Java, but it appears that it doesn't work like that in PHP. The constructor of the child object can't seem to overwrite the instance variable values constructed in the parent object. Here, the parent object is being used just for the common methods between multiple child classes that will extend it. The parent class will never be called on its own.

When I instantiate a new TestPackage, I just get the initialized error values from the parent class. What gives?

<?php
interface Package{
    public function getCode();
    public function decode($packageCode);
    public function getSetName();
    public function getSetNameLang();
    public function getSubsetType();
    public function getSubsetTypeLang();
    public function setSubsetType($typeCode);
    public function getPackageOptionsArray();
    public function getChoicesArray();
    public function getOptionStatus($index);
    public function setOptionStatus($index, $booleanStatus);
}
?>

ParentPackage.php

class ParentPackage implements Package{
    private int $packageCode;
    private int $subsetType;
    private String $setName;
    private String $setNameLang;
    private $packageOptionsArray;
    private $subsetTypeArray;

    public function __construct(){
        $this->packageCode = 0;
        $this->subsetType = 0;
        $this->setName = "Error: parentClass";
        $this->setNameLang = "Error: Parent Class";

        $this->packageOptionsArray = array("Error",   //too much stuff to pass
                                            "Error",  //to a constructor as a variable
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            "Error",
                                            );
        
        $this->subsetTypeArray = array("Error: Initializer",   //16
                                        "Error: Initializer",  //32
                                        "Error: Initializer",  //48
                                        );

     //........A whole bunch more stuff that is too much to pass as a variable to a constructor
     //..... OR let's just say that I don't want to do it that way

    }

TestPackage.php

class TestPackage extends ParentPackage{

    public function __construct(){
        parent::__construct();
        $this->packageCode = 0;
        $this->subsetType = 0;
        $this->setName = "layeredarch";
        $this->setNameLang = "Layered Arch";

        $this->packageOptionsArray = array("Customized welcome sign (choice of trellis half arch or smooth half arch insert up to 25 words text)",
                                            "3 piece seating chart half arch set (print service for cards is available for a small additional fee)",
                                            "Table numbers 1-30",
                                            "Gold Card option04 with choice of Gifts & Cards sign",
                                            "5 Reserved signs",
                                            "Up to 2 Double Half Arch Small signs (Gifts & Cards, Take One, Dont Mind if I Do, In Loving Memory)",
                                            "Up to 2 Sunset Small signs (Please Sign Our Guestbook, Gifts & Cards, In Loving Memory)",
                                            "1 Double Half Arch Medium sign (Cheers, The Bar, Guestbook, or Custom Acrylic Text)",
                                            "1 Double Full Arch Medium sign (Signature Drinks, or Custom Acrylic Text)",
                                            "Unplugged Ceremony sign",
                                            "Hairpin Record Player Prop",
                                            "%22Mr & Mrs%22 Custom Head Table Keepsake is a free gift in addition to the items above"
                                            );
        
        $this->subsetTypeArray = array("Full Set",   //16
                                        "Pick Six",  //32
                                        "Pick Four" //48
                                        );

    }