Simple oop project for php 7.4.9

oop.php

<?php


class Account
{
    //Properties

    private int $id;
    private string $name;
    private float $balance;

    /**
     * Create a new account instance.
     *
     * @return void
     */
    public function __construct($id, $name, $balance)
    {
        $this->id = $id;
        $this->name = $name;
        $this->balance = $balance;
    }


    /**
     * @return integer
     */
    public function getId(): int
    {
        return $this->id;
    }

    /**
     * @return string
     */
    public function getName(): string
    {
        return $this->name;
    }

    /**
     * @return float
     */
    public function getBalance(): float
    {
        return $this->balance;
    }


    public function getAll()
    {

        echo "Id : $this->id <br>Name : $this->name <br> Balance : $this->balance";

    }

}

class SpecialAccount extends Account
{
    private float $interest;

    public function __construct($id, $name, $balance, $interest)
    {
        parent::__construct($id, $name, $balance);
        $this->interest = $interest;
    }

    /**
     * @return float
     */
    public function getInterest(): float
    {
        return $this->interest;
    }

    /**
     * @override
     */
    public function getAll()
    {
        parent::getAll();
        echo "<br> Interest : $this->interest";
    }

}
class Controller
{
    public function index()
    {
        $account = new Account(1, "orhan", 123.32);
        print $account->getId() . PHP_EOL;
        print $account->getName() . PHP_EOL;
        print $account->getBalance() . PHP_EOL;
        print $account->getAll() . PHP_EOL;
        print  "<br><br><br>";
        $special_account = new SpecialAccount(2, "Hasan", 32.00, 1500.00);
        print $special_account->getId() . PHP_EOL;
        print $special_account->getName() . PHP_EOL;
        print $special_account->getBalance() . PHP_EOL;
        print $special_account->getInterest() . PHP_EOL;
        print $special_account->getAll() . PHP_EOL;
    }
}

(new Controller)->index();